The image on the left is described by Wikipedia as the "typewritten confession received by Riverside police and the Riverside Press-Enterprise November 29, 1966". This statement is seemingly at odds with what has been released, because the typewritten message shown in the image on the left was sent to the Riverside Press-Enterprise, and is different to the typewritten message shown on most of the websites and forums on the internet. The Confession letter widely shown on the internet, stamped as having been submitted to the FBI laboratory, is not the same letter shown in the image on the left. When you enlarge and examine the letter on the left, there are at least ten major differences in text compared to the one widely viewed on the internet. The whole structure and sentencing is also different.

In other words, we have to contemplate that the author of the two Confession letters typed two individual correspondences on plain white paper to the value of fourth or fith generation, using carbon paper. A quick look at the image on the left compared to the one with FBI laboratory stamped on it, will show three noticeable differences immediately. The length of underscores after BY are different in each instance. THE CONFESSION title above is underlined, which isn't the case on the FBI laboratory image shown by clicking the link above. The CC. CHIEF OF POLICE ENTERPRISE list of recipients is further from the left margin and a line further down in the image shown above, compared to the image stamped with FBI laboratory. The image widely shown on the internet (and in the link above), should in theory have been addressed to the Riverside police because it is different to the Riverside Press-Enterprise version. Below is the image of the Confession letter widely viewed on the internet (which should have been addressed to the Riverside police). Beneath that is the Confession letter sent to the Press-Enterprise, highlighting ten major differences. The only other explanation for two versions, is that the widely shown Confession letter is a product of having been retyped for greater clarity by law enforcement personnel, but somehow was retyped incorrectly, adding spelling mistakes, correcting spelling mistakes, attempting to correct spelling mistakes but replacing the word with another misspelling, removing sections of typing such as the XXX on the fifth row, and altering words such as "finished the job out" to "finished the job by". One would have thought this would have been done professionally, had the Riverside Police Confession letter sent by the author been the same as the Press-Enterprise version.  

THE CONFESSION LETTER - RIVERSIDE POLICE ​

Therefore, attempting to fit an author's name after BY to align to a particular suspect may be negated by the differing lengths of the underscores in each Confession letter. The author of the Confession letters would also have gained and lost the ability to spell (as well as misspelling the same word twice) between each communication. But why would the author bother to type out two separate and unique communications, when they could have sent the fourth and fifth generation carbon copies from the first typing? Whatever the case, the "ripped at both ends" version sent to the Press-Enterprise (shown in the photograph with the scissors) is an unadulterated version typed by the author. The other version has either been retyped by law enforcement (or under instruction from law enforcement), or was a completely different version sent by the original author.

The three Bates letters have become very topical at the moment based on Riverside police claiming an individual hoaxed the three handwritten communications. They stated "In April 2016, investigators received an anonymous letter postmarked from San Bernardino, California. This letter was typed and appeared to have been generated from a computer. The author of the anonymous letter admitted to writing the hand written letters. The author apologized for sending the letters and said it was a sick joke. The author admitted that he was not the Zodiac killer or the killer of Cheri Jo Bates and was just looking for attention. In 2020, the Homicide Cold Case Unit and the FBI Los Angeles Investigative Genealogy Team, submitted the stamp from the letter for additional DNA analysis and subsequent interviews were conducted. The individual linked to the DNA evidence on the stamp admitted to writing the letter and sending it to Riverside Police Department. The author was a young teenager at the time and had a troubled youth. He said he wrote the letter seeking attention and was remorseful for his actions".

​However, we cannot say with certainty based on this statement, whether the individual in 2016 was telling the truth. Recently I made a comparison between the Riverside Desktop Poem, the Confession Letter and Bates Letters, as follows: If the wording of the Confession letter had been withheld from the newspapers in 1966, it would make any similarities between the Confession letter and Riverside Desktop Poem more significant. It appears that the majority of the text from the Confession letter wasn't released until November 1968, when it was published in the Press-Enterprise newspaper. The title of the Desktop Poem was "Sick of living/unwilling to die".  When we look at the Confession letter the author types two sentences carrying the similar wording of "She was then very willing to talk to me" and "she went very willingly".  The Confession Letter author also typed "I am not sick. I am insane". In other words, the Desktop Poem title is embedded in the story of the Confession Letter. The Desktop Poem concludes with the wording "She won't die, this time someone'll find her. Just wait till next time", suggestive of an impending death - and mirrored in the Confession Letter when the author types the word "time" on a further three occasions and utilizes the word "die" in the same string of wording, by stating "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".  The Riverside Desktop Poem contained the words "to die". The Confession Letter harbored the wording "I said it was about time for her to die" (meaning Bates had to die). Then, five months later, the three Bates Letters contained the wording "Bates had to die there will be more" and "She had to die there will be more".  

​Just over one year later, somebody wrote a series of 5 handwritten letters to Edward Kennedy, Joseph P. Kennedy, Ethel Kennedy and Adlai Stevenson in the June and July of 1968 with various threats. One of which was addressed to Mr. Joseph P. Kennedy, Brookline, Massachusetts and postmarked West Palm Beach, Florida on June 17th 1968. The Confession letter author remarked that "I lay awake nights thinking about my next victom", and seemingly deliberately misspelled the word "victim" by typing "victom" instead. The handwritten note to Joseph Kennedy followed a similar pattern to the Confession Letter, stating "Do you propose "Tedd" to be the next victum", but this time spelling "victim" as "victum".. 

A short time earlier, on June 14th 1968, a handwritten letter to Mrs. Ethel Kennedy, Hickory Hill, McClean, Virginia, postmarked Boston, Massachusetts was received at Senator Kennedy's offices, stating that "Jack had to die. Bobby had to die. Teddy has to die". The three Bates letters contained the threats of "Bates had to die", "Bates had to die" and "She had to die". The author below wasn't "sick of living" however, he was sick of the Kennedy's. The author of the five Kennedy communications is very likely different to the author of the Riverside communications, but I thought it was a noteworthy addition to ponder in light of recent developments.  

If the wording of the Confession letter had been withheld from the newspapers in 1966, it would make any similarities between the Confession letter and Riverside Desktop Poem more significant. It appears that the majority of the text from the Confession letter wasn't released until November 1968, when it was published in the Press-Enterprise newspaper. Here is a brief section from a previous article:making a comparison between the Desktop Poem and Confession letter, both of which begin with a title.

​The title of the Desktop Poem was "Sick of living/unwilling to die".  When we look at the Confession letter the author types two sentences carrying the similar wording of "She was then very willing to talk to me" and "she went very willingly".  The Confession letter author also typed "I am not sick. I am insane". In other words, the Desktop Poem title is embedded in the story of the Confession letter. The Desktop Poem concludes with the wording "She won't die, this time someone'll find her. Just wait till next time", suggestive of an impending death - and mirrored in the Confession letter when the author types the word "time" on a further three occasions and utilizes the word "die" in the same string of wording, by stating "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".   

Is this enough correlation to point to one author of the Riverside Desktop Poem and Confession letter? And could the author of the Bates letters (whoever that may be) be responsible for the two previous communications. Recently, the Riverside Police Department have stated that somebody contacted them via a letter in 2016 claiming responsibilty for the three Bates letters postmarked April 30th 1967. "The author apologized for sending the letters and said it was a sick joke. The author admitted that he was not the Zodiac killer or the killer of Cheri Jo Bates and was just looking for attention". But was the individual who made this admission in 2016 telling the truth? Despite the three Bates letters containing only eight words, they managed to continue the theme of the previous two communications in 1966. The Desktop Poem was titled "Sick of living/unwilling to die". The Confession letter harbored the wording "I said it was about time for her to die" (meaning Bates had to die). Then, five months later, the three Bates letters contained the wording "Bates had to die there will be more" and "She had to die there will be more". In addition, all three communications ended with the threat of further murder. The ending of each carried the wording "Just wait till next time", "I am stalking your girls now" and "There will be more". It is also noteworthy that the Zodiac Killer never wrote the wording "to die", "die" or "died" in any of his communications spanning eighteen years.

Here is some additional information regarding the Confession letter. Before the development of photographic copiers, a carbon copy was the under-copy of a typed or written document placed over carbon paper and the under-copy sheet itself (not to be confused with the carbon print family of photographic reproduction processes). When copies of business letters were so produced, it was customary to use the acronym "CC" or "cc" before a colon and below the writer's signature to inform the principal recipient that carbon copies had been made and distributed to the parties listed after the colon. With the advent of word processors and e-mail, "cc" is used as a merely formal indication of the distribution of letters to secondary recipients. A sheet of carbon paper is placed between two or more sheets of paper. The pressure applied by the writing implement (pen, pencil, typewriter or impact printer) to the top sheet causes pigment from the carbon paper to reproduce the similar mark on the copy sheet(s). More than one copy can be made by stacking several sheets with carbon paper between each pair. Four or five copies is a practical limit. The top sheet is the original and each of the additional sheets is called a carbon copy. A sheet of carbon paper is placed between two or more sheets of paper. The pressure applied by the writing implement (pen, pencil, typewriter or impact printer) to the top sheet causes pigment from the carbon paper to reproduce the similar mark on the copy sheet(s). More than one copy can be made by stacking several sheets with carbon paper between each pair. Four or five copies is a practical limit. The top sheet is the original and each of the additional sheets is called a carbon copy. Wikipedia. .

Robert Graysmith in Zodiac Unmasked stated "November 29, 1966. Two carbon copies of a "confession" letter sent to the press and Riverside Police. Zodiac typed on a sandwich of Teletype paper and carbon paper and mailed the faintest, the fourth and fifth impressions. The original typed top page was never sent". Ordinarily it is wise to double check anything Robert Graysmith claimed, however, in this instance his claims appear to concur with Wikipedia that four or five copies is perfectly feasible in this instance. The fact that the Confession letter was cut at the top and bottom suggests the paper used was taken from a Teletype roll

There is a reasonable argument to be had, that the Confession letter mailed on November 29th 1966 was created by the same author as the Riverside Desktop Poem, with both being created at around the same time by somebody who had access to the Riverside library photocopier and the desktops themselves - possibly a young student who lived in Riverside and attended the college. The author of the Riverside Desktop Poem may have split his poem into two parts: The first part reminiscing in the present tense about the April 1965 attempted murder of a young female student on the Riverside City College campus, who narrowly escaped death after being stabbed by Rolland Taft. A newspaper article entitled "Clean-cut Youth Sought In Stabbing" was released shortly after the attack, that seemed to mirror the opening two words of the Riverside Desktop Poem, and detailed on Ricardo Gomez's MK Zodiac website. The first part of the poem was correct when it asserted "she won't die, this time someone'll find her". The young woman fled the attack and sought help from a nearby residence and was rushed to hospital. The second part of the poem reminisced in the present tense that the next woman would not be so lucky, by stating "Just wait till next time. r h." That person may have been Cheri Jo Bates, brutally stabbed on October 30th 1966 close to the Riverside City College library annex and found on Halloween morning. The newspapers detailed that screams were heard on the night of October 30th 1966 but that her body was discovered the morning of Halloween, so the author of the Desktop Poem may have been using this date when he added Riverside, Halloween at the end of the poem.   

If the wording of the Confession letter had been withheld from the newspapers in 1966, it would make any similarities between the Confession letter and Riverside Desktop Poem more significant. It appears that the majority of the text from the Confession letter wasn't released until November 1968, when it was published in the Press-Enterprise newspaper. Let us make a comparison between the Desktop Poem and Confession letter, both of which begin with a title. The title of the Desktop Poem was "Sick of living/unwilling to die".  When we look at the Confession letter the author types two sentences carrying the similar wording of "She was then very willing to talk to me" and "she went very willingly".  The Confession letter author also typed "I am not sick. I am insane". In other words, the Desktop Poem title is embedded in the story of the Confession letter. The Desktop Poem concludes with the wording "She won't die, this time someone'll find her. Just wait till next time", suggestive of an impending death - and mirrored in the Confession letter when the author types the word "time" on a further three occasions and utilizes the word "die" in the same string of wording, by stating "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".   

There is every chance that the author of these two communications was a young prankster connected to the Riverside City College campus and library, who had knowledge of both attacks in 1965 and 1966, and gleaned everything about these two young women from the newspapers. The connection to both these attacks can be reasoned in the Riverside Desktop Poem, along with the claim of one author being responsible for both communications by the very wording they utilized.   

Rolland Taft was sentenced to 6 months to 20 years for the attempted murder of a young female student on the Riverside College campus in April 1965. She attended evening classes as a student of the college. Taft served 2 1/2 years and was released in 1968. The female victim suffered severe knife wounds in the attack but was able to escape and seek help from her neighbors. On April 17th 1965 The Press-Enterprise ran an article about the attempted murder, running with the headline Clean-Cut Youth Sought in Stabbing. This headline is extremely reminiscent of how the poem on the Riverside Desktop Poem began, with "clean" and "cut" used in each instance. So was the author of the Riverside Desktop Poem familiar with this crime, causing him to reminisce about it as he constructed the poem on the plywood desk?

If the author of the Desktop Poem was referring to this attempted murder, then he was clearly of the opinion that the young girl was stabbed while wearing a new red dress. The poem read "blood, spurting, dripping, spilling; all over her new dress. Oh well, it was red anyway".  The author was referring to past events, fully aware that she didn't die after the attack because someone found her bleeding outside their house and sought help.

Cragle, a regular poster on both forums, is attempting to locate some historic newspaper articles describing the attempted murder in the hope there is mention of the girl's attire that evening. If no newspaper articles or media coverage mentioned her new red dress, it may suggest that the author of the Desktop Poem knew Rolland Taft and the details surrounding the attack - or he knew the young victim and knew first-hand what she was wearing on that fateful evening in 1965. This could indicate that he attended the Riverside City College as a fellow student, with access to the plywood desk in order to write the poem. The most crucial aspect of the poem is the final section, which carries the foreboding message of "She won't die. This time someone'll find her. Just wait till next time. rh". In other words, this girl didn't die by knife, but the next girl will. The author may have written this poem prior to the murder of Cheri Jo Bates on October 30th 1966, with the rh at the foot of the poem a place and time prediction  - that of Cheri Jo Bates in Riverside on Halloween. The murderer of Cheri Jo Bates may have been attempting to lure her to a secondary location to kill her but her valiant struggle against her attacker may have thwarted his plans and resulted in the Halloween prediction falling short by 75 minutes.

The impressionable author of the Riverside Desktop Poem could conceivably have been a student of the college, who was inspired by the attempted murder of Miss Atwood. He could also have known the young woman and studied alongside her. Wherever she had been that fateful evening on April 13th 1965, possibly wearing a brand new red dress, he may have been present. This would be the only reasonable conclusion had she been wearing a red dress and these details were not mentioned in any media coverage (and he didn't know Rolland Taft). If the author of the Desktop Poem was the author of The Confession letter, then the mention of "brush offs" in a seemingly immature typed letter, could place the person responsible for both in the age range of Miss Atwood (19) and Miss Bates (18)- and very likely somebody connected to the Riverside City College. 

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.

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.    

Many attempts have been made to conclusively link the Riverside murder of Cheri Jo Bates on October 30th 1966, as well as 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 being 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", with the last 12 characters containing 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 - - - - - - - - - - - -".  The Confession letter to the Press-Enterprise 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 one of the Confession letters and original notion of 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. However, the number of underscores on the Confession letter to Riverside police appears notably longer. See here.  With differing underscores on both of the Confession letters, any attempt to bind these communications to a particular suspect fails from the outset.  

This analysis fundamentally fails to successfully bridge the divide from Riverside to the Bay Area as many arguments have before - along with a connection between the murder of Cheri Jo Bates and 1966/1967 communications, to the Zodiac Killer.

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?    ​

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" 

I have magnified the photographed version from the Argosy magazine (sent to the Press-Enterprise and shown at the foot of this article) and retyped it below. The photographed version definitely states minutes not minuts, brunett as opposed to brownett, and victom (or victon) as opposed to victim. There are many other differences. Is it possible the author of the Confession letter sent two different versions of the same message to the press and police, or did law enforcement personnel retype the original Confession letter incorrectly and made public this version.   ​

It has long been debated whether the Confession letter sent on November 29th 1966 was the work of the Zodiac Killer. In a recent History Channel docudrama about the Zodiac Killer, the typed Confession letter was analyzed, looking for words that may connect the author of the Riverside correspondence with the infamous Zodiac Killer, focusing on words such as "twich" and "squirm". Here, we will go much further and analyze the readability level of the Confession letter, and compare it with known Zodiac correspondence. The idea, is that even if the author of each correspondence was deliberately misspelling words or dumbing down the intellectual content in each letter, he should be consistently achieving the same readability level. If there is some degree of correlation between the Confession letter and the Zodiac correspondence, it may bolster the argument that the two cases are related - including the stabbing of Cheri Jo Bates and the Bay Area murders. 

The readability level of the above text of this article has an average grade level of 17.04 and a median grade level of 16.40. The November 29th 1966 Confession letter has average grade level of 3.80 and a median grade level of 3.97. These results were calculated using five tools: the Gunning fog index, the Flesch-Kincaid readability tests, the SMOG grade, the Coleman-Liau index and the Automated readability index. Here is a brief run down of each from Wikipedia and their respective link.

Gunning fog index: In linguistics, the Gunning fog index is a readability test for English writing. The index estimates the years of formal education a person needs to understand the text on the first reading. A fog index of 12 requires the reading level of a U.S. high school senior (around 18 years old). The test was developed by Robert Gunning, an American businessman, in 1952. The fog index is commonly used to confirm that text can be read easily by the intended audience. Texts for a wide audience generally need a fog index less than 12. Texts requiring near-universal understanding generally need an index less than 8.
Flesch-Kincaid readability tests: The Flesch–Kincaid readability tests are readability tests designed to indicate how difficult a passage in English is to understand. There are two tests, the Flesch Reading Ease, and the Flesch–Kincaid Grade Level. Although they use the same core measures (word length and sentence length), they have different weighting factors. The results of the two tests correlate approximately inversely: a text with a comparatively high score on the Reading Ease test should have a lower score on the Grade-Level test. Rudolf Flesch devised the Reading Ease evaluation; somewhat later, he and J. Peter Kincaid developed the Grade Level evaluation for the United States Navy.
SMOG grade: The SMOG grade is a measure of readability that estimates the years of education needed to understand a piece of writing. SMOG is an acronym for Simple Measure of Gobbledygook. SMOG is widely used, particularly for checking health messages. The SMOG grade yields a 0.985 correlation with a standard error of 1.5159 grades with the grades of readers who had 100% comprehension of test materials. The formula for calculating the SMOG grade was developed by G. Harry McLaughlin as a more accurate and more easily calculated substitute for the Gunning fog index and published in 1969. To make calculating a text's readability as simple as possible an approximate formula was also given — count the words of three or more syllables in three 10-sentence samples, estimate the count's square root (from the nearest perfect square), and add 3.
Coleman-Liau index: The Coleman–Liau index is a readability test designed by Meri Coleman and T. L. Liau to gauge the understandability of a text. Like the Flesch–Kincaid Grade Level, Gunning fog index, SMOG index, and Automated Readability Index, its output approximates the U.S. grade level thought necessary to comprehend the text. Like the ARI but unlike most of the other indices, Coleman–Liau relies on characters instead of syllables per word. Although opinion varies on its accuracy as compared to the syllable/word and complex word indices, characters are more readily and accurately counted by computer programs than are syllables.
Automated readability index: The automated readability index (ARI) is a readability test for English texts, designed to gauge the understandability of a text. Like the Flesch–Kincaid grade level, Gunning fog index, SMOG index, Fry readability formula, and Coleman–Liau index, it produces an approximate representation of the US grade level needed to comprehend the text.

As another guide, I used the written text from the Coleman–Liau index above to generate an average grade level of 15.69 and a median grade level of 15.72. To check any section of text or the given examples, visit here. Here are the results:

The Confession letter 11/29/66 has average grade level of 3.80 and a median grade level of 3.97. 
The Riverside Desktop poem 1966 has average grade level of 3.89 and a median grade level of 4.00.
The San Francisco Chronicle 7/31/69 has average grade level of 8.15 and a median grade level of 8.12.
The Debut of Zodiac letter 8/4/69 has average grade level of 6.73 and a median grade level of 5.96.
The Paul Stine letter 10/13/69 has average grade level of 7.71 and a median grade level of 7.83.
The Bus Bomb letter 11/9/69 has average grade level of 8.56 and a median grade level of 8.69.
The Melvin Belli letter 12/20/69 has average grade level of 6.25 and a median grade level of 5.66.

The readability levels of the 1966 correspondence is notably lower than the initial Zodiac correspondence, although one has to factor in the near three-year maturation of the subject, if indeed they are the same individual. But both are extremely low on the scale, indicating the Zodiac Killer and author of the Confession letter were either extremely uneducated, or extremely accomplished at pretending to be uneducated. Whatever the case, there is a notable shift from 1966 to 1969.
​The above enlarged text has average grade level of 16.50 and a median grade level of 16.27, which highlights the difference in readability level the author in Riverside and northern California was operating at, either by intention or not.

https://charactercounttool.com/