It is common knowledge that in many knife attacks, such as the one perpetrated on Cheri Jo Bates in Riverside on October 30th 1966, the attacker will often cut themselves with their own knife. The Riverside Police Department (who for the most part did a thorough investigation) must have considered this a strong possibility bearing in mind the viciousness of the attack on the young woman. The Cheri Jo Bates autopsy findings showed extensive defensive wounds on her hands and arms, with the majority of the brutal attack focused on the upper part of her body (from the breasts upwards). The attack had all the hallmarks of somebody known to the victim, planned in advance by the disabling of her prized Volkswagen Beetle. Law enforcement stated that "the driveway adjacent to 3680 Terracina Street was so churned up it looked like a tractor had been over the ground. The girl, who was very athletic, put up a terrific struggle." The driveway and the autopsy report undeniably proved that Cheri Jo Bates did not exit this world like "a lamb to the slaughter", rather a woman who fought valiantly to the last. The police scoured for clues in the alleyway and noted that "at the murder scene, drops of blood were leading from the body to Terracina Street, indicating to the detectives that the murderer had walked back to the street following the slaying". This being the case, they must have considered that the drops of blood could have originated from the killer, who may well have cut himself "when the knife broke".

Cheri Jo Bates was found lying face down in the alleyway, 100 feet from Terracina Drive by groundskeeper Cleophus Martin the following morning. The knife used in the attack was described by Captain Cross as a pocket knife with a "3-inch blade or less." Had the blood really dripped off this small knife leaving a trail all the way to Terracina Drive, or was the killer now nursing an injury.

Mitochondrial DNA was extracted from the crime scene evidence in 1999/2000, leading to a DNA concentration of  0.003 nanograms per microliter being retrieved from a discarded cigarette butt found in the alleyway, and 0.01 nanograms per microliter being retrieved from the hair discovered at the base of Cheri Jo Bates' right thumb. There is however, no mention of the blood from the alleyway floor. This blood trail could be a combination of blood from the knife and blood from the killer, but the longer the trail extends, the likelier it becomes that it originates from the bloodstream of the murderer.

Assuming that the blood was retrieved along the whole trail to Terracina Drive, it would have been extremely routine forensic work in 1966 to determine the blood group of the submitted samples. Cheri Jo Bates' blood type detailed at autopsy is rare in the USA population. It was AB RhD positive, which accounts for only 3.4% of the American population. Any samples submitted that were not an AB blood group were almost certainly from her killer. However, even if the submitted samples were of the same blood group as Cheri Jo Bates, it still doesn't eliminate the possibility of the samples having originated from her murderer. He may have had the same blood type.

The tail of the blood drops would have indicated the directional movement of the killer towards Terracina Drive (as opposed to away), but should also have revealed which side of the alleyway the killer was favoring as he headed towards Terracina Drive - and the likely location of his parked vehicle (assuming he had one). If he had no vehicle, then it could have told us which side of the city he was heading to reach his residence. The diameter of the blood drops (reducing in size or not) could also tell us whether this was a freshly dripping wound, or the gradually reducing volume of blood falling from a knife blade. If the killer was telling the truth when he stated "I plunged the knife into her and it broke", then it is quite possible there was no knife to be dripping. No broken blade was found at autopsy, so it is perfectly conceivable that the hinge mechanism of the small pocket knife may have given way when striking the back of Cheri Jo Bates.

A female earwitness described "an awful scream between 10:15 pm and 10:45 pm, and then about two minutes of silence, and finally the sound of an old car starting up". If the author of the Confession Letter was really the killer of Cheri Jo Bates, then we can estimate the location of his vehicle, assuming the earwithness was hearing the actual murder take place. By combining the direction of the blood trail to one side of Terracina Drive, with the two minute interval from "scream to vehicle starting up", we can use the details in the Confession Letter to pinpoint fairly accurately the location of his vehicle. 
The Confession Letter stated "She let out a scream once and I kicked her in the head to shut her up. I plunged the knife into her and it broke. I then finished the job out cutting her throat". If this is when he "finished the job out" before leaving the scene, then he had two minutes to "kick her in the head, plunge the knife into her, cut her throat" and walk to his waiting vehicle. Allotting about 45 seconds at the murder scene, he has approximately 75 seconds to negotiate the 100 feet to Terracina Drive, and the rest to reach his vehicle. Traveling at an average walking speed of 1.4 meters per second, the 100 feet (30.48 meter) journey would take about 22 seconds, leaving 53 seconds walking time on Terracina Drive. That would mean a vehicle parked 243 feet (74 meters or 81 yards) from the alleyway. Cheri Jo Bates' Volkswagen Beetle was parked 75 yards (68 meters) east of the alleyway, just beyond the library annex. This rough estimate, would place the killer's vehicle only 6 yards (18 feet) behind the vehicle of Cheri Jo Bates (had he exited the alleyway east) - the ideal spot to offer her assistance when her vehicle failed to start - and the near exact location of the Tucker Torpedo (or Studebaker) described in Robert Graysmith's book.       

It is clear that everything contained in the November 29th 1966 Confession Letter was harvested from the newspapers, and whoever created the typed letter was deliberately dragging orchestrated words from the newspapers into their narrative. Below I have used one particular article to demonstrate how the author used superfluous and unnecessary verbiage to flesh out the Confession Letter and convince us they were the killer of Cheri Jo Bates on October 30th 1966. 

The author begins by ladening their introduction with "young and beautiful" and "beautiful blond" just like the newspapers, in order to build the narrative of believability. The author then describes the disabling of the Volkswagen Beetle by disconnecting the "middle wire from the distributor" - another name for the coil wire described in the newspaper publication shown below. This was a key ingredient to convince investigators they were genuine, despite the fact they had approximately four weeks to uncover what the coil wire was. Quote from Liveaboutdotcom: "The ignition coil is the unit that takes your relatively weak battery power and turns it into a spark powerful enough to ignite fuel vapor. Inside ​a traditional ignition coil are two coils of wire on top of each other. These coils are called windings. One winding is called the primary winding, the other is the secondary. The primary winding gets the juice together to make a spark and the secondary sends it out the door to the distributor. You'll see three contacts on an ignition coil unless it has an external plug, in which case the contacts are hidden inside the case. The large contact in the middle is where the coil wire goes (the wire that links the coil to the distributor cap}. There is also a 12V+ wire that connects to a positive power source. The third contact communicates information to the rest of the car, like the tachometer". link.

The Confession letter continues with a vague reference to their car being down the street, which has been gleaned from the anonymous female earwitness account in the newspaper, telling us they heard a "car driving away". This anonymous earwitness account was further harvested for another part of the story, where the murderer apparently kicked Cheri Jo Bates in the head to stop her screaming, stating "she let out a scream once and I kicked her head to shut her up". The female earwitness described "a muffled scream" - almost as though it had been curtailed by a kick in the head.

An appeal for the weapon to be found was broadcasted by police almost immediately, describing it as a small knife or pocket knife, but it was never found. Why would a proclaimed big, brave, boasting killer add the phrase "with a small knife at her throat", if they were not using this to confirm the size of the knife described by police? The addition of the word "small" was totally unnecessary and devoid of any good reason, other than to convince the reader of the Confession Letter they were in fact the killer. If you read the multiple newspaper publications regarding the murder of Cheri Jo Bates, the overwhelming consensus is of a young woman "stabbed in the back, with her throat slashed", despite the fact that the autopsy showed far more wounds on the young woman's body, indicative of a prolonged and violent struggle between Cheri Jo Bates and her assailant. The Confession Letter just parroted these articles, stating "I plunged the knife into her, then finished the job out cutting her throat". The plunging of the knife was referencing the stab in the back, and the cutting of her throat just mimicked her throat being slashed. The fact that the author knew nothing about the intricacies of the crime was evident when they claimed "she went willingly, didn't put up a struggle and went to the slaughter like a lamb" - all of which were clearly untrue, and corroborated by not only the autopsy findings, but the freshly churned up driveway alongside the library.  

However, the most important feature of the newspapers at the time, was the reporting of the anonymous call from a female earwitness who described "an awful scream between 10.15 pm and 10.45 pm, and then about two minutes of silence, and finally the sound of an old car starting up". This earwithness was described as anonymous in several newspaper publications.

The author of the Confession Letter claimed they made a call to the police or newspaper. However, the Riverside Police Department and the Riverside Press-Enterprise could not confirm any phone call made to them by the claimed killer of Cheri Jo Bates. Zodiac Killer Facts wrote "Police could not confirm a phone call to the police or the local newspaper, The Press-Enterprise. The letter was considered most suspicious. Kinkead offered a disturbing conclusion: “The person who wrote the confession is aware of facts about the homicide that only the killer would know. There is no doubt that the person who wrote the confession letter is our homicide suspect.” There has been no confirmation or admission that the murderer of Cheri Jo Bates made any phone calls subsequent to the crime, and as shown above, there is no evidence whatsoever that the killer and Confession Letter author are the same person. In fact, there is no evidence the author of the letter was even a man. Running the wording through many software programs has comprehensively indicated female authorship.

The only phone call we know of, was the anonymous call by a female the following day, describing screams being heard nearby. So, was the author of the Confession Letter when stating "Yes I did make that call to you also. It was just a warning" referring to this call - and pretending they were the anonymous caller as some form of practical joke. If so, then they would be claiming they were female by association. However, what they would not have known, was the extended version of this 'anonmous call' story, elaborated upon in the Inside Detective magazine on January 1969.

Other detectives interviewed residents of a nearby apartment building, A girl tenant in an apartment only a few doors from the dirt driveway where the body was discovered, told the detectives that she heard screaming and yelling about 10:30 pm. "Then I heard a muted scream, and then a loud sound like an old car being started up - this was about two minutes after I heard the first scream", the girl informant said. However, the girl admitted she had not called police that night to inform them of the sounds of apparent violence she had heard.  Inside Detective, 1969. 

The woman/girl was not anonymous because detectives had interviewed her in person at her apartment, but to any newspaper reader in 1966 they could have been forgiven for believing the woman was simply phoning police while remaining anonymous and unknown. Was the author of the Confession Letter, as they had done for all the details typed above, simply taken this "anonymous telephone caller" from the newspapers and claimed "Yes I did make that call to you also"? - and why the Riverside Police and Riverside Press-Enterprise recollect no phone call being received by the killer. If this were the case, then the author of the Confession Letter is effectively admitting they are a female, and certainly not the Zodiac Killer. If the author of the Confession Letter was actually the murderer of Cheri Jo Bates, then the young Riverside City College student could conceivably have been murdered by another woman - a story that I doubt many would believe.

Although I am still split down the middle on a Zodiac connection to Riverside, Tom Voigt (from ZodiacKiller.com) is correct in suggesting that the Riverside murder of Cheri Jo Bates on October 30th 1966, being our 'groud zero', could open many doors in discovering the identity of the Zodiac Killer, where tangible evidence was recovered from the victim's hand and floor of the alleyway. Identifying commonalities between Zodiac crimes and Zodiac victims could be invaluable in narrowing down our search for the infamous Bay Area murderer. While understandably cautious about the two tips he received regarding a link between Cheri Jo Bates and Cecilia Shepard, it is a lead certainly worth pursuing amid the uncertainty of a viable DNA fingerprint. Just like geographic profiling, if we can tie the Zodiac Killer to a specific location through two victims, then many further doors could open.

In the April of 2019, Tom Voigt received an email stating that Cecilia Shepard and Cheri Jo Bates were known to one another - often frequenting the popular Sorrento Italian Restaurant on Magnolia Avenue. This corroborated a previous tip he had received fifteen years ago, thereby adding credence to the possibility the two girls knew each other. In 1966, Cheri Jo Bates was a student at the Riverside City College, whereas Cecilia Shepard attended the nearby La Sierra University, just 4.6 miles east of the infamous Corona crosshairs, where Joseph Bates (father of Cheri) worked as a machinist for the Corona Naval Ordnance Laboratory. Corona used to hold car racing around its city center in the early 1900s, primarily because of the unique layout of its streets, incorporating Main Street, East Grand Boulevard and West Grand Boulevard which formed a perfect circle. It was originally called South Riverside and is widely known as 'Circle City.'

The Sorrento Italian Restaurant was located at 9844 Magnolia Avenue. La Sierra University was located at 4500 Riverwalk Parkway, one mile north of Magnolia Avenue, with the Riverside City College at 4800 Magnolia Ave. The Italian restaurant just 2.5 miles from the grounds of La Sierra University. Tom Voigt makes an interesting connection to the November 29th 1966 'Confesion' letter in which the author concludes "I am not sick. I am insane. But that will not stop the game", and reminiscent of the "dangerous game" he played out in the Bay Area. Tom Voigt hypothesised on whether there may have been an element of truth in the author's frankness, deducing that the only psychiatric facility available in 1966 was the Riverside General Hospital University Medical Center (founded 1893) and located at 9851 Magnolia Avenue, virtually on the doorstep of the Sorrento Italian Restaurant. Tom Voigt concluded that if the Zodiac Killer was responsible for the murder of Cheri Jo Bates and received any treatment for a mental illness, then it's perfectly conceivable he received this treatment across the road from the Sorrento Restaurant - and may have visited the restaurant himself. Placing two victims and the Zodiac Killer in the same room would obviously turn the search for the infamous Bay Area murderer on its head, albeit layered with a degree of cautious optimism.

After 25 years of chasing the Zodiac Killer and many blind alleys, the link between Cecilia Shepard and Cheri Jo Bates (although still has to be conclusively proven) has invigorated Tom Voigt in his quest for the identity of the Zodiac Killer and bolstered his belief that the Riverside murder of Cheri Jo Bates on October 30th 1966 and the Bay Area murders are inextricably linked. Did the inception of the Zodiac Killer begin on Magnolia Avenue, ultimately taking the crosshairs of Corona to his correspondence in the Bay Area and the "road races" of Presidio Heights, just under three years later? Tom Voigt is determined that the journey has only just begun.

To visit the forum thread pertaining to this subject, please visit the Zodiac Killer message board. Tom Voigt has also released a 14 minute 32 second Youtube video outlining other material regarding the suggested connection between Cecilia Shepard and Cheri Jo Bates.

We will take a look at the Riverside murder of Cheri Jo Bates on October 30th 1966 strictly from the perspective of the vehicle used by the killer, obviously presuming he had used one that evening. Robert Graysmith made an unusual reference in his book 'Zodiac Unmasked' stating "Cheri Jo checked out three books from the local college library. Though her friends were at the small, cramped library between 7:15 pm and 8:57 pm, none recalled seeing her there. At 9.00 pm when the archives closed, she returned to her car to discover the engine would not catch. And here she had been working part-time at the Riverside National Bank. Parked behind her car was a Tucker Torpedo that had not been there before". 
Robert Graysmith would claim nobody recalled seeing Cheri Jo Bates in the cramped library between 7:15 pm and 8:57 pm, but somehow he surmised she had returned to her vehicle at 9:00 pm, where a Tucker Torpedo was observed parked directly behind her Volkswagen Beetle. This obviously flies in the face of everything we know about her movements that night. Robert Graysmith clearly embellished many sections of his book, blurring the line between fact and fiction, but to pluck a Tucker Torpedo out of thin air for no apparent reason, could suggest a semblance of truth - particularly when we consider only 51 Tucker Torpedo's were ever made before the company folded in 1949. Also, based on the very small production of this vehicle, it may be extremely likely that this vehicle was mistaken for an altogether more common make of car.      

Although the front end grill is different, it is conceivable that the person who originated the Tucker Torpedo sighting was an attendee at the Riverside City College library on that fateful night and gave this description to police during the library reconstruction on November 13th 1966. A young student, more familiar with current day automobiles, could easily have made an error in identifying a vehicle 18 years old. Parked behind Cheri Jo Bates' vehicle in relative darkness, the Studebaker vehicle shown above exhibits similarities to the Tucker Torpedo. This vehicle parked facing westwards toward the library entrance would most likely have been observed from its front end as students were leaving the library annex. The sheer fact this vehicle was highlighted by Robert Graysmith is of particular interest when we consider the sighting of a 1947-1952 Studebaker on Riverside Avenue on the evening of the murder.    

After the library reconstruction an article appeared in the Daily Enterprise on November 1966. It stated "Detectives investigating the murder of Cheri Bates are looking for a car almost identical to this one. Police say a 1947-52 model Studebaker with light-colored, oxidized paint was parked on Riverside avenue just south of Terracina about 7 p.m. on the night that the Riverside City College freshman was stabbed to death. Detectives said a recent re-enactment of the murder at the college campus provided this information. They ask anyone who knows of a car similar to this one, used by police to stage this photograph, to contact the Police Department".

Although it is possible this information was given by a student attending the library reconstruction, Riverside Avenue sat just around the corner from Terracina Drive in 1966, and it is possible that this vehicle would not have been noticed by a student as anything suspicious at around 7:00 pm while passing a random vehicle parked on a street. I took a cursory look into Riverside Avenue on street view in Google maps and discovered this is a fairly affluent and scenic road, with properties in the order of $400,000. The very place that a homeowner would notice an old oxidized vehicle sitting outside their property for any length of time. Had they read the Daily Enterprise in November, it is certainly feasible they had contacted the Riverside Police Department and shared this information of a suspicious, out of place vehicle sitting idle for a noticeable time period. If this were the same vehicle parked behind Cheri Jo Bates' vehicle just two hours later, misidentified as a Tucker Torpedo (built in the same time frame of the 40s), then this is at the very least noteworthy. The Studebaker was described as a 1947-1952 model, suggesting the person who described the vehicle knew their cars. This may add weight to a resident of Riverside Avenue, with a decent income and more mature in years, being knowledgeable enough to specify the exact years of 1947-1952 when the Studebaker Champion third generation was manufactured in a completely redesigned fashion.  

These sightings would not necessarily be significant, if it wasn't for the fact of an earwitness to the murder of Cheri Jo Bates later that night, described in the newspapers as "a neighbor who heard an 'awful scream' between 10.15 and 10.45 pm, and then about two minutes of silence, and finally the sound of an old car starting up." They obviously felt it significant enough to describe the vehicle as an "old car", which ordinarily wouldn't catch the attention, but for the two previous sightings mentioned by Robert Graysmith and the witness in the Daily Enterprise newspaper. The final thing to examine, is whether this brief audible recollection of an old vehicle starting up approximately two minutes after the scream, tallies with the location of the old vehicle (Tucker Torpedo or Studebaker) parked behind Cheri Jo Bates' lime green Volkswagen Beetle.  

As shown in the diagram above, we can see that if the murderer parked his vehicle behind the Volkswagen Beetle, then he had a 325 foot journey back to his vehicle after leaving the crime scene. Average walking pace is approximately 4.5 feet per second, so we will raise this to 5.0 feet per second for somebody leaving the scene of a crime. Our perpetrator should take about 70 seconds to reach his vehicle just beyond the Volkswagen Beetle. We will now use the 'Confession' letter mailed on November 29th 1966 (assuming it was typed by the killer) to determine the time period from the scream to when he departed the crime scene. It stated "She let out a scream once and I kicked her in the head to shut her up. I plunged the knife into her and it broke. I then finished the job out cutting her throat". This suggests that after Cheri Jo Bates had screamed, she was thrown to the ground, where the perpetrator performed three actions [1] Kicked her in the head [2] Plunged the knife into her back (the only wound to the rear of her body), and [3] cut her throat. Allowing approximately 20 seconds to achieve what he stated, he proceeds to walk the 70 seconds to his vehicle. To enter his vehicle and start the engine roughly another 20 seconds. The total time elapsed from the scream to the engine starting is now approximately 110 seconds, or 1 minute and 50 seconds, exactly matching the "about two minutes of silence" described by the earwitness close to the alleyway. This would corroborate the unknown eyewitness who described an old 40s vehicle parked behind the Volkswagen Beetle of Cheri Jo Bates.   

If all these three vehicles described are actually one and the same, it is then a matter of formulating the movement of this vehicle between the 7:00 pm and 9:00 pm sighting. Did the killer park his vehicle a distance from the library and walk to the Riverside College to disable Cheri Jo Bates Volkswagen Beetle, thereby reducing the chances of his vehicle being noticed by passing library traffic, only getting into position closer to the time the library closed? Did he drive to the library briefly (before 7:15 pm), disable her vehicle and then drive away (parking up at various locations in the vicinity, such as Riverside Avenue), before returning into position to be the first 'good Samaritan' to offer Cheri Jo Bates his help? There could be any number of possibilities. There is every chance these vehicles are completely irrelevant to the murder of the young college student, but with so little to go on, it is certainly worthy of consideration.     

Some of the questioned Zodiac communications address certain individuals using the lower case format, and the March 13th 1971 'Los Angeles' letter refers to Riverside in the same fashion: "I do have to give them credit for stumbling across my riverside activity, but they are only finding the easy ones, there are a hell of a lot more down there". The Riverside Desktop Poem, written sometime in 1966 and believed to have been signed off with the author's initials, also featured two lower case letters. The clue to "rh" may lie in the poem itself and in the first correspondence by the Zodiac Killer on July 31st 1969 - assuming you believe a connection between Riverside and the Bay Area murders. That is because there is a real possibility the Riverside Desktop Poem was authored prior to the murder of Cheri Jo Bates on October 30th 1966. If you believe that Cheri Jo Bates was stalked surreptitiously in the weeks or months before her death, then the Desktop Poem is the precursor or warning, and the Confession letter is the completion of that threat. 

If we look at the wording on the Riverside Desktop Poem (below) from the standpoint of somebody stalking Cheri Jo Bates, then it is perfectly conceivable that at some point in time the wannabe killer has noticed the young woman wearing a red dress and fantasized about making her pay for the "perceived brush-offs" he has endured. But what is noticeable, is that the author states "she won't die this time, someone'll find her". If the young woman was to be stabbed, why would someone necessarily find her? If his mind is seeing his fantasy in the present during school hours and in the context of a busy Riverside City College campus, then one could easily see how she could be rescued and survive. However, in the next line he is projecting his mind to the future by stating "just wait till next time". The only way "next time" could conceivably have a different outcome, is if he lures Cheri Jo Bates away from the Riverside City College campus - and this is exactly what he said he was attempting to do when he typed the November 29th 1966 Confession letter, thirty days after Cheri Jo Bates' murder. He stated "I then offered to help. She was then very willing to talk to me. I told her that my car was down the street and that I would give her a lift home".  

If the murderer of Cheri Jo Bates had made a promise to seek her out "next time" in the Riverside Desktop Poem, and had some connection to the college, or was in her near or outer circle, is it really realistic he would give his true initials at the foot of the Desktop Poem to give law enforcement a helping hand? On the other hand, if they weren't really his initials and he had just placed two random letters together, then it is a rather pointless exercise. The Zodiac Killer wrote "riverside" in the 1971 'Los Angeles' letter and "halloween"/"Halloween" in the questioned 1987 correspondence, showing yet again his ability to ignore the upper case form of these titles. It is these two words that may give us the meaning to the "rh" at the foot of the Desktop Poem. The poem indicated the necessity of the killer to separate Cheri Jo Bates from the college campus so somebody wouldn't find her in time, thereby resulting in her death. Had he achieved such an objective, then her death may very well have occurred past the midnight of October 30th, rather than around 10:30 pm when screams were heard emanating from the campus alleyway. He was ultimately thwarted by Cheri Jo Bates, who likely fought back vigorously when she was being coerced towards his vehicle. The killer ultimately boasted that this was not the case by stating "I said it was about time. She asked me 'about time for what'. I said it was about time for her to die".  This was clearly a line pulled straight from his imagination, to give the impression he was in complete control throughout. Had Cheri Jo Bates not fought valiantly against her abduction, then the prophecy of "rh" would have been realized: "Just wait till next time, riverside halloween".

On July 31st 1969, the Zodiac Killer wrote "If you do not print this cipher by the afternoon of Fry.1st of Aug 69, I will go on a kill ram-Page Fry. night. I will cruse around all weekend killing lone people in the night then move on to kill again, until I end up with a dozen people over the weekend". The Bay Area murderer was always promising more bloodshed in the future - and the Riverside Desktop Poem was no different. But on that occasion he gave us the exact time and place.    

Whether the Zodiac Killer was responsible for the murder of Cheri Jo Bates (18) in Riverside on October 30th 1966 has been widely debated. The young woman was found brutally stabbed on Halloween morning by groundskeeper Cleophus Martin. The Zodiac Killer would lay claim to this murder on March 13th 1971 when he stated in the 'Los Angeles' letter "I do have to give them credit for stumbling across my riverside activity, but they are only finding the easy ones, there are a hell of a lot more down there". This made it curious that the Zodiac Killer's previous communication was the October 27th 1970 'Halloween' card and its obvious implications of a murder related to Halloween. Sandwiched between the 'Halloween' card and 'Los Angeles' communications was the November 16th 1970 Paul Avery article in the San Francisco Chronicle declaring there was 'New Evidence in the Zodiac Killings.'  This seemed rather convenient timing immediately after a card based around Halloween.

The Riverside and Zodiac connection was first proffered by Phil Sins, who Michael Morford was fortunate enough to interview in 2012. He stated "that as far as he can remember, he initially asked Avery to contact Riverside Police, and that he only got involved directly with Riverside Police Department after he made contact with Avery. He stated that he linked the two cases just by the overall similarity in the taunting letters. It also got his attention that Bates was killed on Halloween Eve and Zodiac sent a Halloween card. He told Avery to look into it, and get a writing expert as there were writing samples in Riverside. He says he has monitored the case since making the connection. He himself never had any suspects nor did he have any theories in particular". This peaked my interest regarding the design of the Halloween card, and whether the Zodiac Killer was finally incorporating Cheri Jo Bates into his running victim total (now 14), whether or not he was responsible for her murder or not. If Phil Sins drew a connection between the 'Halloween' card and Riverside, what else may he have observed?      

The pumpkin placed over the first skeleton has always been a curiosity - unless of course - the Zodiac Killer is effectively 'date stamping' this claimed fourteenth victim. He placed the number 14 on the hand of the skeleton and placed a pumpkin over the pelvic region, not only associating this victim with Halloween, but scoring the victim count of 14 onto the skeleton itself. Bearing in mind the murder of Cheri Jo Bates was four years prior, was this choice of imagery relevant?

David Faraday (17), Betty Lou Jensen (16) and Michael Mageau (19) were three teenage victims of the Zodiac Killer, despite the fact that Michael Mageau survived the attack at Blue Rock Springs. Cheri Jo Bates (18) was also a teenager. The Zodiac Killer wrote the number 14 on the hand of the first skeleton, so could easily have written this number again over the skull of the skeleton on the card inner (shown right). He could have written "fourteen", but deliberately chose to separate the "4" and "TEEN", indicating that these offerings were to be interpreted as two separate words. In the spoken word, this could mean FOUR TEEN or FOR TEEN. The Zodiac Killer placed twelve eyes onto the 'Halloween' card (one was already present at manufacture), suggesting that these held an important significance to the message the card was attempting to prompt from the reader. The simplest answer, when we consider the addition above the skeleton's head, is "look for teen". In totality, the Zodiac Killer is effectively saying "look for teen, who I have inscribed as my fourteenth victim, discovered on Halloween". The pumpkin attached to the skeleton should be the biggest clue in this regard. 

Phil Sins contacted Paul Avery regarding the taunting letters and the 'Halloween' card observation, so it is no surprise that the Paul Avery article surfaced on November 16th 1970 putting forth a possible connection between the Zodiac murders and the brutal stabbing of Cheri Jo Bates in Riverside. But was the Zodiac Killer telling the truth when he stated "I do have to give them credit for stumbling across my riverside activity", and was the 'Halloween' card the prompt, subsequently interpreted by Phil Sins? 

Here is an extract from the letter sent by the Riverside City College library staff regarding their favorite 'suspect' Ross Sullivan. The first thing we notice, is that even they admit that police told them Ross Sullivan had an alibi for the time period of Cheri Jo Bates' murder. This clearly wasn't enough for the amateur sleuths of the Riverside City College library (we have to assume the police are just lying) who went on to compile a horrifying list of infractions and suspicious behavior perpetrated by Ross Sullivan. These include
[1] His "potential for doing harm" - although we have no cited examples of harm inflicted upon any of the library staff. However, what he potentially could have done, is possibly a cause for concern.  
[2] Bragged about escaping over the wall from Patton State Mental Hospital, which doesn't equate to being a murderer.
[3] The library staff member stated "I wish I could remember the poem about the cataloging boss he and I both had. I remember that she did not understand the poem he wrote. I didn't either but was frightened by it". Frightened by a poem you neither understand and can't remember, is terrifying enough on its own
[4] "We could see him from the cataloging department. He was like a statue - always there". Clearly he was a menacing statue - not moving - but an ominous presence nevertheless.
5] "When the murder happened, I stated to my fellow workers that when Ross reappeared on campus (because he was not around the day after the murder), and if he had on different clothes, then he would be guilty in my mind, until someone proved him innocent". I really hope this person never sat on a jury. Whatever happened to those good old values of 'innocent until proven guilty'? Whatever happened to 'beyond a reasonable doubt'? I hereby sentence you to 50 years for buying new clothes.
[6] "Sure enough, it was a few weeks before he reappeared at his spot on the pit wall and he had on a totally new set of clothes". Guilty as charged Sir - how dare you wear a different set of clothes after a few weeks.
[7] "One rainy night after he was back in Riverside, I stopped at a liquor store in Market Street. I pulled up alongside a car that was parked just in front of the store doors. I ran inside but left the doors locked as I always do. When I ran back to my car something told me to do a very strange thing. I ran around to the passenger side and in a flash I had the door open and was inside and the door locked behind me. Just at that instant Ross came from a large hedge in front of my car door and walked between the two cars and out of the parking lot. He did not look at me. Needless to say I drove out of there as quickly as possible". This is called historical narrative building - creating a sensationalized and novelistic reconstruction of events that never happened. The person is selling you a story. Using the introduction of "one rainy night" is unnecessary to the story, used for dramatic effect. She just happened to pull up to a liquor store where Ross was hiding behind a bush in the rain, then coincidentally "something told her to do a very strange thing" - get in the wrong door of her vehicle, just before Ross "instantly" emerged from a large bush. What told her to do a very strange thing? - a sixth sense of impending doom, before she raced away fearing for her life. The fact of the matter, is that nothing happened - and if Ross Sullivan was there, he was likely just walking by without even noticing her. Had he glared at her menacingly from his sodden, furrowed brow, with dastardly intent, the story may have been a bit more compelling. Or, if he had he leaped from the bush wielding a dripping axe and mumbling incoherently.  
[8] "Ross apparently parked a motorbike close to one of the faculty members car each day during the fall of 1966. That faculty member also put Ross at the top of his list as a suspect in the murder. Didn't apartment residents near the murder site recall hearing a motorbike start up just after the screams". No they didn't, so it is probably advisable to read up on the facts of the murder, before establishing Ross Sullivan at the top of your suspect list - guilty of parking his motorbike close to a car in the parking lot. Was it menacingly close, bordering on threatening? Did it get closer each day, inching to a dramatic conclusion? Was it raining each day?
[9] "There are half dozen or so of us at Riverside City College that agree on a suspect - but it isn't one that the police are interested in". I will probably side with the police on this one, who actually did a proper investigation and stated he had an alibi. On the flip side, the library staff may have a compelling case to bring to court  - Ross Sullivan was smelly, changed his clothes at least once, allegedly hopped from a bush in the rain without an axe, threateningly parked his motorbike in the campus grounds, wrote poems nobody can remember and moved as fast as a statue, apart from when he was vaulting mental hospital walls. In his spare time he murdered five people in the Bay Area, despite the fact nobody can place him within 75 miles of any crime scene. On a rainy night, maybe he rode stealthily into the Bay Area on his old Triumph motorbike four times, placing the executioner's costume in the top box on September 27th 1969 for the return journey to Santa Cruz. Or maybe some evidence would help. 

Many attempts have been made to conclusively link the Riverside murder of Cheri Jo Bates on October 30th 1966, along with the accompanying communications, to the Zodiac Killer. The three 'Bates' letters, on April 30th 1967, ended the Riverside chapter, with the three July 31st 1969 letters to the San Francisco Chronicle, San Francisco Examiner and Vallejo Times-Herald, beginning the Zodiac chapter. But is the hidden identity contained within the 408 cipher (if it exists) somehow connected to the hidden author of the November 29th 1966 'Confession' letter? It is paramount to make a distinction between name and identity when attempting to formulate any cohesive link between the Confession letter and 408 cipher, because the Zodiac Killer claimed he wouldn't give us his name in the decoded 408 cipher, but did claim it would reveal his identity.

​When we take a close look at the decoded 408 cipher, it can be argued that he made a fundamental error when he encoded his original message, accidentally omitting the word "people" in the ciphertext. This is explained in 'The 18 Unsolved Characters [Pt3]'  This effectively created a shortfall of 6 characters in his 408 cipher, which had he not done, would only have left 12 unsolved characters at the end of the message. In view of the Bay Area murderer identifying himself as "Zodiac" just four days later, it was considered that his impatience may have compelled him to reveal his identity earlier than he would have liked, and "Zodiac" was integral to his identity in the 12 characters at the end of the 408 cipher. The hidden identity, therefore, the "Zodiac Killer". 

Had the 408 cipher read "the best part of it, is that when I die I will be reborn in paradice and all the people I have killed will become my slaves", and the last 12 characters contained his identity, then by extension, we should be looking backwards to Riverside for the previous time he used a form of cryptic or hidden message. The only letter that contained such an instance, was the November 29th 1966 letter beginning "The Confession by - - - - - - - - - - - -".  This contained 12 underscores of, presumably, the hidden name or identity of the killer. For those believing a connection from Riverside to the Bay Area, the potential murderer of Cheri Jo Bates may have cloaked his identity behind 12 underscores in the Riverside 'Confession' letter and 12 characters in his communication with the San Francisco Chronicle on July 31st 1969.  The 'Bates' letters correlated via a trinity of letters, whereby the 'Confession' letter correlated through the identity of twelve.

This analysis fundamentally fails to successfully bridge the divide from Riverside to the Bay Area, as many arguments have before - and the connection between the murder of Cheri Jo Bates and associated communications, to the Zodiac Killer, will remain a hot button topic for many years to come no doubt - but the search goes on.

The most detailed description of the Zodiac Killer was presented in the days after the murder of Paul Stine in Presidio Heights, likely arrived upon by an amalgamation of two sets of eyewitnesses. The final age range estimated at between 35-45 years of age and semi-corroborated by Officer Donald Fouke, who described the suspect as 'graying in the rear' in his November 12th 1969 memorandum. The age of the killer may be relevant, when we consider the dramatic change in writing style from November 29th 1966/April 30th 1967 to the beginning of the Zodiac letters in 1969, just two years later. Is it possible to examine the linguistics from correspondence in the Cheri Jo Bates murder to the later writings and determine if they were authored by the same individual?  

The Zodiac Killer never bragged or labored the point about his four canonical attacks or five murders with respect to the victims. The closest he came was describing the attack on Michael Mageau, stating "When I fired the first shot at his head, he leaped backwards at the same time, thus spoiling my aim. He ended up on the back seat then the floor in back thashing out very violently with his legs; that's how I shot him in the knee."  But on this occasion he was prompted for more details about the crimes by Vallejo Police Chief Jack Stiltz, and duly responded. 
However, in the 'Confession' and Bates letters, just 2 to 3 years earlier, the author seemed to be relishing in the pain and misery he inflicted on Cheri Jo Bates and her family.
With statements such as "I said it was about time for her to die, she squirmed and shook as I chocked her and her lips twiched, and I then finished the job out cutting her throat," it had all the hallmarks of a killer who enjoyed reliving the events of that night, as well as exacerbating the heartbreak and suffering felt by family and friends. The author, not only named his victim in both letters, something the Zodiac Killer always steered away from, but he also mailed a letter to the father of the victim, Joseph Bates.
The addresses of the victims in the Zodiac crimes were routinely published in the newspapers, yet the Bay Area murderer failed to make contact with any of the victims families through mailed correspondence. The killer seemed to almost depersonalize the victims, only referring to them as kids, teenagers, boy, girl, woman, man, taxicab driver and people. When it came to his adversaries such as newspaper reporters, columnists, attorneys and police, then he had little problem naming Paul Avery, Marc H Spinelli, Herb Caen, Melvin Belli and David Toschi (depending on the validity of the correspondence).
Were the crimes simply his requirement to be taken seriously, so he could begin his letter writing campaign? In other words, they were not his primary focus, and why the attacks apparently ended after only 10 months.  

The most sexually explicit reference in the confirmed Zodiac letters was his statement of "man is the most dangerous animal of all to kill something gives me the most thrilling experience it is even better than getting your rocks off with a girl" in the deciphered 408 cryptogram. However, even this is downgrading sex below murder.
The 'Confession' letter is altogether different, referencing lying awake thinking about beautiful women, stating "Her breast felt very warm and firm under my hands, her lips twiched, keep your sisters, daughters and wives off the streets and alleys, I shall cut off her female parts and deposit them for the whole city to see and I am stalking your girls now." 
The emphasis of the letter is based solely on women, not couples, men or children. It also has a sexual component, not particularly evident in the Zodiac letters.
On March 13th 1971 the Zodiac Killer part-indicated his involvement in the Riverside murder of Cheri Jo Bates, but even then he couldn't refer to her by name - something he supposedly had no problem doing in both the Riverside correspondences a few years earlier. So, was the Riverside murderer really the Zodiac Killer?    ​

On the morning of October 31st 1966 at 6:30 am, Cleophus F. Martin (49), a groundskeeper at the Riverside City College discovered the stricken body of Cheri Jo Bates in an alleyway between two vacant properties. He was also described as a janitor on the website Find A Grave. Cleophus Martin died in 1975. Whether or not he is the same person who discovered the 'Riverside Desktop Poem' is open to speculation. Four years earlier, on February 28th 1962, the San Bernardino County Sun ran an article entitled 'San Bernardino Youth Knifed in Wild Attack on Redlands Road'. Here is the article text.    

"Three men were held for questioning in the knifing of a 19-year-old San Bernardino youth Monday after a highway incident that wound up in a wild, four-mile chase with occupants of one vehicle throwing rocks and debris at the other vehicle.
Charles Albert Schuler, 19, of 7695 Merito Avenue, was treated at Community Hospital for cuts on the shoulder, right elbow and left hand that he said was inflicted by a curved flooring knife.
His companions, Perry Lee Thomas and Bill Roan, both of San Bernardino, and Robert Claude Cockrell said they were attacked at Highway 99 and Alabama Street on the outskirts of Redlands about 5 pm Monday.
They said their three assailants, occupants of a pick-up truck, pushed in the windows of the hardtop in which the four were riding, and one of the assailants shoved in a pocket knife and started swinging it.
The four said they then got out of their car, but were chased by the other three, all of whom had knives. Witnesses said that Schuler was chased through heavy traffic. His shirt was cut to ribbons by his knife-swinging assailant.
After dodging knives for a while, the four youths got back in their car and fled. They said the three in the pick-up truck loaded the truck bed with rocks and debris, and chased the car four miles to Tippecanoe and Central.
One of their assailants rode in the truck bed and the other on a running board, hurling rocks and debris at the car, the four said. The truck was identified through a license number and three men were later picked up by Detective Jay D. Hughes.
Booked in the County Jail for questioning were Booker T. Washington (47), his son, John T. Washington (26) and Cleophus Martin (43) of 1577 Vine Street, all of San Bernardino. Detective William Paterson of the homicide division is investigating."   

Cleophus Martin was born on 15th October 1917, which would have him 44 years of age on February 28th 1962, not 43, as referenced in the newspaper. Due to the rarity of the name and the location of San Bernardino, it could be argued that this was the groundskeeper/janitor who discovered the body of Cheri Jo Bates. This man likely had nothing to do with the murder of Cheri Jo Bates, and was unfortunate enough to discover the terrible events of the previous night, nevertheless, it begs the question of how familiar the perpetrator was in respect to the Riverside City College campus.

Was the murderer of Cheri Jo Bates familiar enough with the Riverside City College campus to know that the two properties either side of the attack site were empty? Did he have access to the Riverside library storage room to write on the underside of the desktop in relative anonymity? Did he use paper acquired from the Riverside college?  "A photocopying machine, where students could secure 8 1/2 X 11 inch black and white copy of printed or typed material, was available at the library for ten cents." The photocopying machine would have been acquired by the college library to accommodate the paper likely used by the college staff and students. The three Bates letters mailed on April 30th 1967 measured 8 1/2 X 11 inches, identical to the size offered by the photocopier in the library. 

Credit to ZodiacKillerIdentified on Youtube.

When Stephanie Guttman turned down the opportunity to accompany Cheri Jo Bates to the Riverside City College library on the afternoon of October 30th 1966, did she make alternative arrangements that ultimately led to her early demise. Despite entering the library to acquire her reading material shortly after opening time, she left within minutes. Nobody remembers seeing the young girl from 6:30 pm to 9.00 pm that evening, indicating she exited the library and went elsewhere. She wasn't murdered until approximately 10:30 pm that night, when screams were heard in the vicinity of the alleyway. At approximately 9:30 pm a female student purportedly noticed a man standing in the fateful alleyway smoking a cigarette and exchanged brief greetings with him. It is therefore clear that Cheri Jo Bates had been murdered subsequent to this encounter. 
The following observations take a new approach to the murder of Cheri Jo Bates, based upon the structure and wording of the 'Confession' letter mailed one month later. 

Everything contained in the 'Confession' letter was information readily available in the newspapers, however, this doesn't necessarily indicate that the author of the letter wasn't the killer. But there is a narrative in the letter that completely flies in the face of what was possible. The author of the 'Confession' letter described the middle wire of the distributor being pulled, the small knife and the cutting of the throat, which were all reported in the newspapers and totally correct, yet gave the impression that everything happened in one continuous timeline, which was impossible.
The impression given, is of a woman who enters the library while her vehicle is being disabled, and then exits to find her car won't start. The good Samaritan then offers her assistance and escorts her to a promise of a lift in his vehicle just down the street, before stabbing her. We know Cheri Jo Bates wasn't murdered between 6:00 pm and 9:30 pm, so why does the author cover all his bases in convincing the reader he is the killer, but fail so horribly with the timeline. 
Many details of the crime were printed in the newspapers, including an "awful scream between 10:15 pm and 10:45 pm and then a loud sound like an old car starting up." The author of the letter uses this scream in his letter, stating "she let out a scream once and I kicked her in the head," along with the presence of his vehicle: "I told her that my car was down the street and that I would give her a lift home."  However, if he knew she had exited the library to find her car disabled, then his story doesn't work from the standpoint of a 10:15 pm to 10:45 pm attack, as the library closed at 9:00 pm. Besides, he stated he followed her out of the library after about 2 minutes, and we know she left prior to 6:30 pm. Why is the author (if the killer) trying to give the impression that Cheri Jo Bates never left the campus that evening, when clearly her movements were unknown for approximately 4 hours. 
The author blatantly disregards the time of 10:15 pm and 10:45 pm in his continuous timeline, but certainly makes use of the scream and vehicle, to give us the impression he had killed Cheri Jo Bates moments after she exited the library. Does he weave his vehicle into the story to convince us he had to travel a reasonable distance to arrive near the alleyway, and therefore lives a reasonable distance away, when in actual fact he lived within walking distance of the Riverside campus.
If the author of the 'Confession' letter was the Zodiac Killer, he may have used this tactic nearly three years later, when using his vehicle as evidence he didn't live close to the payphone at Springs and Tuolumne after the attack at Blue Rock Springs.
If Cheri Jo Bates had left the library annex voluntarily before 6:30 pm and hooked up with somebody who lived nearby, who then escorted her back to her vehicle at around 10:30 pm, then the disabling of her vehicle could have taken place while she was present during an altercation. This would explain both windows rolled down, the right door being possibly ajar and the keys present in the ignition. A murder at approximately 10:30 pm with little passing traffic is an altogether more likely scenario, particularly when we consider the screams heard by eyewitnesses.
The author and killer would have been unaware at the point of writing, of a female student and man present in the alleyway with no body, and was desperate to shift the timeline 4 hours earlier, thereby ruling out any possibility of Cheri Jo Bates having ever left the campus to a nearby residence with somebody she knew. The use of his vehicle in the letter was the window dressing, to paint a completely different picture to the one that really happened that night - that Cheri Jo Bates was escorted from the campus on foot at around 6:30 pm by somebody she trusted. Somebody that would eventually betray that trust a mere 4 hours later.

The idea that the murderer of JonBenet Patricia Ramsey on 25/26th December 1996 would break into the Ramsey household, write a two and a half page ransom note using a notepad and pen found within the house (taking in excess of 22 minutes to compose), rather than write the note beforehand, and then not actually kidnap the young girl, but kill her in the basement, beggars belief.
Analysis of the note and the language contained within it, tends to indicate that it was written by a female.

Mr. Ramsey,
Listen carefully! We are a group of individuals that represent a small foreign faction. We do respect your bussiness but not the country that it serves. At this time we have your daughter in our posession. She is safe and unharmed and if you want her to see 1997, you must follow our instructions to the letter.
You will withdraw $118,000.00 from your account. $100,000 will be in $100 bills and the remaining $18,000 in $20 bills. Make sure that you bring an adequate size attache to the bank. When you get home you will put the money in a brown paper bag. I will call you between 8 and 10 am tomorrow to instruct you on delivery. The delivery will be exhausting so I advise you to be rested. If we monitor you getting the money early, we might call you early to arrange an earlier delivery of the money and hence a earlier delivery pick-up of your daughter.
Any deviation of my instructions will result in the immediate execution of your daughter. You will also be denied her remains for proper burial. The two gentlemen watching over your daughter do not particularly like you so I advise you not to provoke them. Speaking to anyone about your situation, such as Police, F.B.I., etc., will result in your daughter being beheaded. If we catch you talking to a stray dog, she dies. If you alert bank authorities, she dies. If the money is in any way marked or tampered with, she dies. You will be scanned for electronic devices and if any are found, she dies. You can try to deceive us but be warned that we are familiar with law enforcement countermeasures and tactics. You stand a 99% chance of killing your daughter if you try to out smart us. Follow our instructions and you stand a 100% chance of getting her back.
You and your family are under constant scrutiny as well as the authorities. Don't try to grow a brain John. You are not the only fat cat around so don't think that killing will be difficult. Don't underestimate us John. Use that good southern common sense of yours. It is up to you now John!
Victory!
S.B.T.C  Youtube.

This will be an exploration into the premise that the November 29th 1966 'Confession' letter, the Riverside 'Desktop Poem' and the three Bates letters were written by a female, consumed with hatred and jealousy towards her fellow womenfolk, and not by the murderer of Cheri Jo Bates, brutally stabbed and beaten in a Riverside alleyway on October 30th 1966.
Here is the wording contained within the typed 'Confession' letter:
​
She was young and beautiful. But now she is battered and dead. She is not the first and she will not be the last. I lay awake nights thinking about my next victon. May'be she will be the beautiful blond that babysits near the little store and walks down the dark alley each evening about seven. Maybe she will be the shapely blue eyed brunett that said xxx no when I asked her for a date in high school. But maybe it will not be either. But I shall cut off her female parts and deposit them for the whole city to see. So dont make it to easy for me. Keep your sisters, daughters and wives off the streets and alleys. Miss Bates was stupid. She went to the slaghter like a lamb. She did not put up a struggle. But I did. It was a ball. I first pulled the middle wire from the distributor. Then I waited for her in the library and followed her out after about two minutes. The battery must have been about dead by then. I then offered to help. She was then very willing to talk to me. I told her that my car was down the street and that I would give her a lift home. When we were away from the library walking, I said it was about time. She asked me "about time for what". I said it was about time for her to die. I grabbed her around the neck with my hand over her mouth and my other hand with a small knife at her throat. She went very willingly. Her breast felt very warm and firm under my hands. But only one thing was on my mind. Making her pay for all the brush offs that she had given me during the years prior. She died hard. She squirmed and shook as I chocked her. And her lips twiched. She let out a scream once and I kicked her in the head to shut her up. I plunged the knife into her and it broke. I then finished the job out cutting her throat. I am not sick. I am insane. But that will not stop the game. This letter should be published for all to read it. It just might save that girl in the alley. But that's up to you. It will be on your conscience. Not mine. Yes I did make that call to you also. It was just a warning. Beware....I am stalking your girls now.
CC.
Chief of Police Enterprise.

Although not wholly scientific, the wording from the 'Confession' letter was placed into two online tools to determine the gender of its author.
Textgain, a web service for predictive text analytics, predicted a female of 25 years or over, with 75% confidence.  
Hacker Factor, in formal genre, scored 849 for female and 428 for male, and a weak emphasis for European origin.
This analysis is not pushing the idea that the author of the Riverside communications was a female, simply considering it a possibility based on the language used- particularly within the 'Confession' letter and Riverside 'Desktop Poem'. 
The 'Confession' letter author appears to be reveling in the murder and demise of Cheri Jo Bates, a trait not exhibited by the Zodiac Killer, who, not only never mentioned his victims by name, but didn't dwell on the nature of the murders themselves. Here, the author is positively wallowing in the details of their achievement, opening with the lines "She was young and beautiful. But now she is battered and dead." In addition to being morally bankrupt, the author is going out of their way to exhibit a spiteful and malicious streak in the tone of the letter. Providing details of the crime to prove their connection to it, which they ultimately failed to do, appears of secondary importance to the author.  
Scouring any piece of text to discover the gender of its author is similar to handwriting comparison- it's subjective and dependent on the observer, and therefore cannot be scientifically validated. This is important to remember when reading the following observations.
Would a male individual have used the language contained within the 'Confession' letter? Just like the JonBenet Ramsey ransom note, the author appears to be selling a story- how "the shapely blue eyed brunett said no when I asked her for a date in high school" or maybe they will kill "the beautiful blond that babysits near the little store and walks down the dark alley each evening about seven." 
Phrases such as "the shapely blue eyed brunett," "the beautiful blond that babysits near the little store," "she went very willingly. Her breast felt very warm and firm under my hands," "keep your sisters, daughters and wives off the streets and alleys" and "it just might save that girl in the alley. But that's up to you. It will be on your conscience. Not mine" raises some questions as to the gender of the 'Confession' letter typist, who is adding superfluous detail into the story behind the murder of Cheri Jo Bates. In addition to this, making sure we understood that 'he' was rejected "by the shapely blue eyed brunett" and was "brushed off" by Cheri Jo Bates many times in 'his' pursuit of a heterosexual relationship. 
For those who believe a Riverside connection to the Zodiac Killer, another factor must be considered- despite the addresses of the Bay Area victims being widely publicized in the newspapers, not once did the Zodiac Killer write to the family members of the victims, such as David Faraday, Betty Lou Jensen and Darlene Ferrin, to name but three- as typified by the author of the Joseph Bates letter, in what can only be described as a cruel and unnecessary act.
The mailing of the Joseph Bates letter, again exemplified the callousness of an individual who seemingly bathed in the misery of the murder itself, something evidently absent from the Zodiac communications.
Are these observations, particularly regarding the 'Confession' letter, suggestive of a female author, or a male of effeminate tendencies or inadequacies who just got "brushed off." Or possibly a complete stranger. Your thoughts on either the 'Confession' letter or the JonBenet Ramsey ransom note would be welcome.      

Without a DNA or fingerprint connection apparently linking Riverside and the Zodiac Killer, many have tried to link the two through his correspondence. Was the Zodiac Killer responsible for the murder of Cheri Jo Bates in Riverside on October 30th 1966, and if so, was he a well-read individual with connections to the campus library?

David Oranchak of ZodiacKillerCiphers highlighted the text of Edward Hyde, Earl of Clarendon, present in the 408 Cipher, in his article entitled 'Throw the book at him, Part 3'. The section of text is from a book called 'The life of Edward, Earl of Clarendon, lord high chancellor of England: Volume 2': ​Forty-six consecutive letters from this text corresponds with a section of the 408 cipher. Dave Oranchak, the foremost expert on the Zodiac ciphers, commented on this "So, only one piece of text, from a vast collection of eleven billion pieces of text, fit into this chunk of cipher text. A one in eleven billion chance seems to suggest some significance. But don’t be fooled by this. Just because this rare event occurred, doesn’t mean it is anything more than a simple coincidence. If we didn’t already know the real solution to the 408, how do we know that this chunk of old and obscure text isn’t the correct solution?" I wanted to validate or refute whether this was a simple coincidence or not by examining whether the works of Edward, Earl of Clarendon featured anywhere else in Zodiac or Riverside correspondence. One wouldn't envisage many American criminals using the writings of a seventeenth century English statesman to form part of their serial murder exploits, and certainly not without access to a comprehensive library of books.

This is when I noticed another piece of obscure text from Edward, Earl of Clarendon and flew back to the last piece of notable text from the presumed Zodiac Killer on the Riverside desktop - the title of which was "sick of living/unwilling to die." One of Edward Hyde's quotes was “They who are most weary of life, and yet are most unwilling to die, are such who have lived to no purpose, — who have rather breathed than lived.” http://izquotes.com/quote/385232. ​Although not perfect, I couldn't help wondering if the Zodiac Killer was recalling from memory, as he did his paraphrasing of 'The Mikado'. Had he plagiarized "weary of life, unwilling to die" to "sick of living, unwilling to die," and would then later hide another section of Edward Hyde's text in the 408 cipher, as a form of link between the murder in Riverside and the Bay Area.

Edward Hyde, Earl of Clarendon was also an avid user of ciphers as revealed here in literary manuscripts; 
"Naturally a substantial portion of Clarendon's surviving manuscripts comprises his personal correspondence — both letters received by him from numerous correspondents and his own letters, written or signed by him, whether drafts, retained copies, or the letters actually sent. Among many notable examples are his letters written in August 1646 to William, Lord Widdrington, and to Sir John Berkeley, announcing the beginnings of his History of the Rebellion, and the letter he wrote on 12 November 1646, to Sir Edward Nicholas, describing his plan for the work and stating that he had already completed sixty sheets of it. Some of his letters, particularly those dating from the Civil War period, are wholly or partly in cipher or make use of pseudonyms in both salutations and signatures. The codes to sixteen such ciphers used by the Royalists are written out in Bodleian, MS Clarendon 94, and see also British Library,"

However, are there any alternatives to Edward Hyde - someone that possibly connects the 'Confession' letter and Riverside 'Desktop Poem' together, using the title of each communication. I have always believed the Zodiac Killer was driven by some form of warped religion - one that drove him to the confession box after each crime and manifested in the form of letters mailed to the newspapers and police. Using the Riverside library as our primary focus once again, did the works of an early Christian theologian and philosopher influence the writings of Zodiac?
 
'Peter A Fiore concludes that John Milton (an English poet, author of Paradise Lost, polemicist, man of letters, and civil servant for the Commonwealth of England) like many humanists, Christian philosophers, Reformers, and theologians of every variety in the early seventeenth century, drew widely from Augustine and that such indebtedness gave a richer and fuller theological dimension to his epic of lost paradise and enhanced the meaning of the poem.' 
link  The Augustine he is referring to is St Augustine of Hippo (13 November 354 - 28 August 430), a Roman African, Christian theologian, whose writings influenced the development of Western Christianity and Western Philosophy. His work was translated by many individuals, but here are a few examples:

1] "Now is not the time for asking questions but for confessing to You. I was wretched, just as every mortal soul is wretched who is bound to the friendship of mortals. We are torn to pieces when we lose them, and so become aware of how wretched we were, even before we lost them. This is the way it was with me. I wept bitterly, and found rest only by weeping. I was so wretched that I held that life of wretchedness to be more dear to me than the friend for whom I wept. Even though I wanted to change it, I was more unwilling to lose it than I had been to lose my friend. Actually, I doubt that I would be willing to lose it even for him, as it is said of Orestes and Pylades, if that is true, that they would have gladly died for each other, or both died at the same time, rather than living part from each other. But I had begun to be afflicted with a strange kind of feeling, different from theirs. I cannot explain it, but I was tired of living and yet, I was afraid to die." link.​

2] "I do not know whether I would have been willing to die for him in the way that Orestes and Pylades, if the story is true, were willing to die together for each other. And yet a strange feeling had grown in me, and it was very different from theirs; I was sick and tired of living but I was too afraid to die." link.

​3] "But in me there was an odd kind of feeling, the exact opposite of theirs, for I was at once utterly weary of life and in great fear of death." link.
​
4] "I was at the same time thoroughly tired of living and extremely frightened of dying.”
link.
​
Was this a case of the Zodiac Killer recalling the literary work of another, as he did with Gilbert and Sullivan's The Mikado, but paraphrasing it. However, in this instance, the author chose sick of living/unwilling to die as his title of the 'Desktop Poem'. On its own, this connection could appear a little unconvincing, but the author of the Riverside 'Desktop Poem' may have mailed correspondence to the Riverside Homicide Detail and Riverside Press Enterprise on November 29th 1966, in the form of letters entitled 'The Confession'.

Two weeks after the October 30th 1966 murder of Cheri Jo Bates, the Riverside Police staged a library reconstruction of the crime on November 13th 1966. The probable murderer then mailed the 'Confession' letters. St Augustine of Hippo wrote the Confessions (in which the above examples of text are contained), an autobiographical piece of work consisting of 13 books. "The Confessions of Saint Augustine in order to distinguish the book from other books with similar titles. Its original title was Confessions in Thirteen Books, and it was composed to be read out loud with each book being a complete unit. Confessions is generally considered one of Augustine's most important texts. It is widely seen as the first Western autobiography ever written, and was an influential model for Christian writers throughout the Middle Ages. Professor Henry Chadwick wrote that Confessions will "always rank among the great masterpieces of western literature." link.  St Augustine of Hippo was born on November 13th, the exact date of the library reconstruction. 

"The City of God Against the Pagans (Latin: De civitate Dei contra paganos), often called The City of God, is a book of Christian philosophy written in Latin by Augustine of Hippo in the early 5th century AD. The book was in response to allegations that Christianity brought about the decline of Rome and is considered one of Augustine's most important works, standing alongside The Confessions, The Enchiridion, On Christian Doctrine and On the Trinity. As a work of one of the most influential Church Fathers, The City of God is a cornerstone of Western thought, expounding on many profound questions of theology, such as the suffering of the righteous, the existence of evil, the conflict between free will and divine omniscience, and the doctrine of original sin. Shortly before Augustine's death, the Vandals, a Germanic tribe that had converted to Arianism, invaded Roman Africa. The Vandals besieged Hippo in the spring of 430, when Augustine entered his final illness. According to Possidius, one of the few miracles attributed to Augustine, the healing of an ill man, took place during the siege. According to Possidius, Augustine spent his final days in prayer and repentance, requesting that the penitential Psalms of David be hung on his walls so that he could read them. He directed that the library of the church in Hippo and all the books therein should be carefully preserved. He died on 28 August 430. Shortly after his death, the Vandals lifted the siege of Hippo, but they returned not long thereafter and burned the city. They destroyed all of it but Augustine's cathedral and library, which they left untouched."  Wikipedia.

​Was the murderer of Cheri Jo Bates somehow connected to the Riverside library, a well-read individual, who subtly introduced sections of text from St Augustine of Hippo into the titles of both the 'Riverside Desktop Poem' and 'The Confession' letter in order to give himself a feeling of superiority over the police and newspapers, as he would ultimately do several years later?

"SICK OF LIVING, UNWILLING TO DIE" 

In light of the possible capture of the Golden State Killer on April 24th 2018, there has been renewed excitement in recent weeks concerning the possible DNA left by the Zodiac Killer when he mailed his many correspondences. Other sources that may have harbored DNA have been mentioned, such as the car door, bottle and Zodiac bindings at Lake Berryessa, the gloves from Presidio Heights, along with potential blood from the killer deposited on the clothing of Cheri Jo Bates at Riverside on October 30th 1966. This may or may not be a Zodiac crime, but it is still an avenue that must be pursued. 
Michael Cole, who runs the 'Zodiac Revisited' website, details the mitochondrial DNA findings of 1999, obtained by Michael Morford and pertaining to the case of Cheri Jo Bates. But the hope is now, that a full DNA profile can be obtained and cross checked using genealogy websites and familial DNA linkage. Separating any blood from the killer on Cheri Jo Bates clothing by locating Y-markers has always presented a challenge to forensic investigators in a mixed sample, however, there is a possibility that we may, or could have had the blood of the killer at Riverside from somewhere other than the clothing of Cheri Jo Bates.
"The Y chromosome is currently by far the most popular marker in genetic genealogy that combines genetic data and family history. This popularity is based on its haploid character and its close association with the patrilineage and paternal inherited surname." PubMed.
Riverside Police were meticulous in their evidence gathering, performing a library reconstruction of events the night of the murder and taking fingerprints and hair samples from attendees of the library on Sunday October 30th 1966. They retrieved a hair sample from a blood clot at the base of Cheri Jo Bates' right thumb, recovered a cigarette butt from the alleyway floor and took fingernail scrapings from the victim. They also clearly considered the possibility that the killer of Cheri Jo Bates may have cut himself during the attack with a less than sturdy knife, described by Captain Cross as a pocket knife with a "3-inch blade or less." Even the author of the 'Confession' letter on November 29th 1966 (whether the killer or not) claimed that the knife broke towards the end of the attack. Was this the pivotal moment that ended the callous attack on the defenseless young woman.
The 'Inside Detective' magazine revealed one crucial piece of evidence from the Riverside alleyway crime scene. It stated "The driveway adjacent to 3680 Terracina Street was so churned up it looked like a tractor had been over the ground. The girl, who was very athletic, put up a terrific struggle. At the murder scene, drops of blood leading from the body to Terracina Street indicated to the detectives, that the murderer had walked back to the street following the slaying."
Using an old overhead view of the campus in 1966 (not shown here) and the fact she was positioned between the two vacant properties of 3680 and 3692 Terracina Drive, it is possible to calculate how far Cheri Jo Bates' body lay up the alleyway from Terracina Drive. Below I have placed all the relevant distances.     

Cheri Jo Bates was lying approximately 100 feet southwest of Terracina Drive, shown in relation to the football field and scoreboard in the distance. That is an extensive blood trail leading away from the body, if the interpretation of the police statement is correct. 
​The 'Confession' letter stated "When we were away from the library walking, I said it was about time. She asked me "about time for what". I said it was about time for her to die. I grabbed her around the neck with my hand over her mouth and my other hand with a small knife at her throat. She went very willingly." If the attack began in the vicinity of where her body was discovered, we are left with two possibilities: The blood trail to Terracina Drive was the victim's blood, dripping from the killer, or the killer's blood dripping from a cut hand. The blood trail, if significant enough to be noticed by detectives, was continuous to the sidewalk of Terracina Drive, then it could be argued to be blood secreted from a continuously bleeding hand, as opposed to a killer having blood on his person (absorbed by his clothing) or a small knife. Presumably, the killer would have pocketed the knife in advance of reaching the street. This must have been considered by investigators who visited the crime scene. But, was this blood gathered from the alleyway floor and stored for 'future use'? 
Cheri Jo Bates' blood type detailed at autopsy is rare in the USA population. It was AB RhD positive, which accounts for only 3.4% of the American population. Even with the limited forensic capabilities in 1966, this testing was a simple affair, and could have determined whether the blood trail extending toward Terracina Drive was that of the killer's or from the victim.
The pattern or tail of the blood drops could certainly have determined the direction of the killer within the alleyway. Since detectives concluded that the "drops of blood leading from the body to Terracina Street indicated to the detectives, that the murderer had walked back to the street following the slaying," then it remains a possibility that the killer injured himself during the attack, allowing the trail of blood to extend the full 100 feet in distance, as opposed to the limited blood secretion possible from a small pocket knife or clothing. 
If the murderer of Cheri Jo Bates cut himself when he delivered the stab wound to the young woman's back during the latter part of the attack, there may be limited blood transfer to her clothing, however, there may be have been far more present in the vicinity of the crime scene, during his 100 foot journey to exit the alleyway. By odds alone, it is unlikely the killer had an AB RhD positive blood type, making it easy to determine the origin of the blood on the alleyway floor, and whether it was from Cheri Jo Bates or even the Zodiac Killer himself.