Michael Morford wrote an excellent article on the June 8th 1967 murders of Enedine Molina (35) and boyfriend Fermin Rodriguez (36) near Pleasanton, California. This was covered on this site and discussed on Zodiac Killer Site forum.
​Below I shall detail this double murder using a visual from Google Maps and only the newspaper reports that covered the story, to sequence the order of events that night. Here is a layout of where the victims were found in relation to the March 22nd 1970 abduction of Kathleen Johns on Highway 132, west of Modesto, and the city of Pleasanton, where Zodiac mailed the 'Los Angeles' letter on March 13th 1971.    

"According to detectives Regional Park Naturalist Richard Angel called the Santa Rita sheriff's substation last night (Thursday June 8th 1967) and reported hearing two shots in the park area at 10.05 pm. The woman's body was discovered about 11.00 pm just outside the remote Sunol Regional Park. The body was found by Deputy George Robinson, the first man to arrive at the park. Mrs Molina had been shot in the back (and possibly left wrist). It appeared she had been running when she was shot, deputies reported.
On his way back to the substation about 2.30 am (Deputy George Robinson) spotted a station wagon parked along Vallecitos Road about six miles from the park, stopped to check it and found Rodriguez's body. He had been shot in the left breast and shoulder bone. The bullets entered his body from the front deputies said. The murder weapon was believed to be a .22 caliber revolver. No gun was found."  Detectives ordered weekend roadblocks to canvass individuals.
"The weekend roadblocks were in the areas of Geary Road and Calaveras Road. Captain Tom Houchins said officers questioned persons between 10.00 pm and midnight, believed to be the timespan when the two were killed. Houchins said there is the possibility that another car was involved.
A Mountain View man, Joe Martinez of 1819 Birch Street (ex-husband of Enedine Molina), turned himself in at the Sunnyvale Police Station this morning after hearing he was wanted for questioning. He was later released by Sunnyvale Police and Alameda County sheriff's officers. Captain Tom Houchins, in charge of the investigation said "as of now we have no suspects." 
Detectives investigated suspicious events in the run-up to the double murder:
"Investigation of the two June 8 murders in Sunol has disclosed that each of the victims had been followed several times by an unidentified driver. Each also received mysterious phone calls over a period of many months, according to reports from Alameda County Sheriff's deputies." The daughter of Molina "told detectives the family had been receiving disturbing telephone calls at her mother's residence since July. She said that whoever called didn't speak and that all that could be heard over the phone was heavy breathing (reminiscent of the 0.1.30 am calls on July 5th 1969, after the BRS attack). The daughter said the calls usually were made between 10 and 11 am, or between 7 and 8 pm, and that her mother was usually not home when they were received. Detectives also reported that the daughter told them she had overheard her mother say that a car followed her when she was out. Substantially, the same story was given detectives by Mrs Lydia Rodriguez, widow of Fermin Rodriguez, who was found murdered in his car parked along Vallecitos Road. Mrs Rodriguez said her husband had also complained about a car following him. On another occasion, she said, her husband had told her he had seen the strange car parked in front of his house, but could not describe the driver."  

This was a couple attacked while parked up in their vehicle, not dissimilar to the Lake Herman Road and Blue Rock Springs attack. The obvious connection is apparent with respect to the abduction of Kathleen Johns just 28 miles east of where the vehicle of Molina and Rodriguez was discovered. These murders were one and a half years prior to the double murder of David Faraday and Betty Lou Jensen, who were also killed using .22 small caliber ammunition. Then there is the menacing silent phone calls to the 1300 Virginia Street residence of Darlene Ferrin. Yet, these murders also have the trait of jealousy, in the form of a previous partner or husband unable to move forward. What evidence was given to discount Joe Martinez, or fail to implicate him we may never know.
​Detectives stated that "officers questioned persons between 10.00 pm and midnight, believed to be the timespan when the two were killed." They also believed "another vehicle was involved."
The indications from the newspaper reports seem to suggest the murder occurred at approximately 10.05 pm, when Enedine Molina was attempting to flee from her assailant, after leaving his vehicle. Fermin Rodriguez had likely already been murdered at this point in time, when the killer approached in his vehicle, murdered him and abducted the woman. His body was discovered in his vehicle 6 miles north on Vallecitos Road. The time of his murder was likely 10 minutes earlier at 9.55 pm, if the two murders were one continuous sequence of events. 
One alternative could be, the killer approached the couple on foot as they were in their vehicle on a dirt turn off, just alongside Calaveras Road (by Geary Road), shot the woman, and then forced the male victim to drive north to Vallecitos Road, before murdering him and fleeting on foot. However, this seems the less likely of the two. 
Whether these murders have any connection to Zodiac is likely never to be proved or disproved half a century on, but being only 38 miles south of Vallejo (as the crow flies) it is worthy of consideration. 
Thanks to Michael Morford.   

The 'Halloween' card was mailed to the San Francisco Chronicle on October 27th 1970 inferring a fourteenth victim. On July 26th 1970 the Zodiac Killer mailed the 'Little List' letter claiming thirteen victims. If nurse Donna Ann Lass was a Zodiac victim, then the 'Halloween' card must surely have been referring to the disappearance and likely murder of Donna Lass from the Sahara Tahoe Hotel & Casino on September 6th 1970. But why did it take the Zodiac Killer nearly two months to send this correspondence to the San Francisco Chronicle newspaper? Was it imperative for the killer to somehow tie this possible murder into the Halloween festival, and did the depiction of skeletons, the pumpkin and the phrase "peek a boo you are doomed" provide any clue to the location of Donna Lass' body or burial site.
This by all accounts was a bold and brazen abduction at the end of the young woman's shift at approximately 1.50 am, in a seemingly predetermined crime. If this was a serial offender, such as the Zodiac Killer, the clues may lie in previous similar unsolved crimes with overlapping traits. The following ideas will be examining this possibility, using the design of the 'Halloween' card and later 'Pines' card mailed on March 22nd 1971, also believed by some to have been crafted by the hand of the Zodiac Killer. 

The choice of a skeleton on this card may have been deliberate, bearing in mind Donna Lass was likely murdered the day of her abduction and had remained undiscovered for nearly two months at this juncture. It is also easy to understand how the card can be interpreted as a skeleton wearing a pumpkin. But what if the depiction is implying something more sinister, in that Donna Lass is buried beneath a pumpkin or pumpkins. This may seem a ridiculous observation, until we consider the second skeleton on the card inner wearing a mask of sorts. Could the killer have intended us to interpret the card differently, such as an eye patch, thereby implying the phrase 'pumpkin patch.' 
The clue may not be entirely literal, but implying the young woman may have been buried on farmland, which may have grown pumpkins or sold farm produce. This is a real stretch, so we will go further. 
Randall Scott Clemons produced an interesting article linking the Zodiac Killer to various golf courses, and suggesting that he may have traveled extensively to murder in certain areas he was familiar with through his pastime. In his first contact with the newspapers on July 31st 1969 the killer stated "This is the murderer of the 2 teenagers last Christmass at Lake Herman + the girl on the 4th of July near the golf course in Vallejo." The murderer of Paul Stine on October 11th 1969 escaped into the Presidio Park adjacent to the Presidio Golf course. The Aetna Springs Golf Course, Napa, was one of the first golf courses west of the Mississippi River and built on the Aetna Springs Resort's property in 1891. It is only 11 miles as the crow flies from the Knoxville Road, bordering Lake Berryessa, the site of Zodiac's third attack on Bryan Hartnell and Cecelia Shepard.​

But more crucially, it is less than 5 miles from Pope Valley, the location where the three young women had driven through at around 3.00 pm on September 27th 1969, just before they encountered a strange man, who appeared to be following them. Did he have a ball marker on him that day, which came in useful at around 6.30 pm?
Deana Hooper's skeletal remains were discovered on March 11th 1975 in an open field at Columbus Parkways and St.John's Mine Road, right next to the Blue Rock Springs Park Golf Course. She was last seen on July 11th 1974 at the Enlisted Men's Club on Mare Island.  Established in 1892, Mare Island Golf Club in Vallejo, California is the oldest golf course west of the Mississippi River. Originally built as a 9-hole course,  its first 30 years included sand greens and dry fairways. The course began near the former Marine Barracks and proceeded south to Lake Rodgers (built in 1876 and named after Rear Admiral Rodgers), then returned to the start. Was the killer somehow connected to the military, and an avid golfer, that inevitably made him familiar with these murder sites?

The 'Pines' card depicted an advertisement for mountain condominiums.
A newspaper article stated that: 'the site depicted on the 'Pines Card' was from an advertisement published last Sunday by several newspapers. It was an artist's rendition of houses among the trees at a Boise Cascade Company project at Incline Village, where construction has just begun on the development. While much of the Sierra area is under several feet of snow, Incline Village has only two feet on the ground. Police went to the area to determine if a search is possible'.
Many observers toyed with the idea that Donna Lass may have been buried by the punch hole in the card- but surely that would have been too simple a clue by the Zodiac Killer. In another stretch of the imagination, could the positioning of 'Sierra Club' on the tree, be designed to give the impression of a flagpole. We would then be possibly looking for a burial site east of a Sierra Club golf course- not at Incline Village- but somewhere 'past the Lake Tahoe areas'. Somewhere the killer was familiar with, and had used to bury a previous victim. 

​Judith Hakari was a nurse at Sutter Hospital, who disappeared heading back to the Markston Apartments on March 7th 1970. Her body was later discovered by Ponderosa Way in Weimar, forty two miles along Interstate 80.​
'At 11:30 pm. Hakari calls her fiance to tell him she's leaving Sutter Memorial Hospital where she works as a nurse. By 1:30 in the morning, she has still not come home. Her fiance, waiting at her apartment, begins to worry.
"He went out to the apartment complex parking lot and discovered her car was parked in the assigned space that she had," Links said. But Judith was nowhere to be seen. She was found one month later, strangled and bludgeoned to death. "Some hikers discovered a body in a shallow grave up in the town of Weimar, in Placer County. And during their investigation they determined that it was Judith Hakari," Links said.' Fox40.com.
Both Judith Hakari and Donna Lass were nurses, who disappeared after their shift end, both at night or in the early hours of darkness, and both en route back home. Is it conceivable that the murderer of Judith Hakari is also responsible for the abduction and murder of Donna Lass, and if so, did he bury or conceal her body somewhere he was familiar with and had ultimately escaped detection before- in Weimar. Or somewhere very close. 

We could be looking for a location in Placer County near farm land, that may have a connection to pumpkins. There will be a Sierra Club golf course west of the location. It may also be a location that has relevance to parts of the phrases contained within the 'Halloween' card, such as "From your secret pal," "peek a boo you are doomed" and "slaves." And more importantly, somewhere close to where Judith Hakari's body was discovered.
There is such a place- Colfax, Placer County, California.
It was named after Schuyler Colfax Jr, known for his opposition to slavery while serving in Congress, and was a founder of the Republican Party. In January 1865, as Speaker of the House, Colfax made the unusual choice to cast a vote for passage of the Thirteenth Amendment.
Colfax is located 4.4 miles (crow flies) from Ponderosa Way, the burial site of Judith Hakari.
The Bierwagen's Donner Trail Fruit and Farm Market near Chicago Park, is situated only 7 miles east of the Alta Sierra Country Club and golf course.
Secret Town is 7 miles from Colfax and 14 miles from Ponderosa Way.
The residence of Judith Hakari and the area her body was discovered, not only were situated alongside Interstate 80, but Ponderosa Way is only 2 miles or 5 minutes from Interstate 80, and the Markston Apartments only 4 miles or 8 minutes from Interstate 80. 
Interstate 80 is bisected by Colfax and runs from the Markston Apartments where Judith Hakari lived, to Truckee, California on the north side of Lake Tahoe. As the crow flies, Ponderosa Way is 38 miles from the Markston Apartments and 46 miles from Truckee. Was the same killer responsible for the murder of both women, and prepared to create a set buffer zone to each burial site? A familiar 'dumping ground' similar to that employed by the likes of the Green River and Gilgo Beach Killer.
Finally, we have this lonely lane, in the heart of 'pine country,' where you can "peek through the pines" into "peek a boo" lane- as the crow flies, just 2 miles from Ponderosa Way. But would you be doomed?   

The disappearance and eventual discovery of the remains of Deana Hooper has been covered on many forums. It is an interesting case, primarily because of the location her skeleton was discovered bordering Columbus Parkway and Blue Rock Springs Park (see below). Thanks to Zamantha for turning the article into readable text.  

​​According to the missing person's report filed last July by Mrs. Albright, Hoffman said her sister last had been seen on July 11 at the Enlisted Men's Club on Mare Island (additional information below). Hoffman said Mrs. Albright gave no reason reason for delaying the report of her sister's disappearance until July 15th. Hoffman said Deana Hooper and Tonna Albright had been adopted about eight years ago from an orphanage in Hong Kong by their foster father Dean Hooper, a Caucasian ex-serviceman who now lives at 234 Thomson Ave, Sonoma. Hoffman said he notified Hooper that the skeleton found here had been tentatively identified as his missing adopted daughter. According to Hoffman, Hooper confirmed he had suspected all along that Deana was dead, after she disappeared without a trace last July and that Mrs. Albright confirmation of the identifications of the skeleton came as no surprise to him.
Hoffman said it is his belief the skeleton found Tuesday by an Oakland chiropractor and his 8 year one son, flying kites on the Azevedo Ranch, had lain in the field undetected since last July 12. He indicated the location of the skeleton in high weeds 40 feet east of the nearest roadway would have made it virtually impossible for someone to see the remains, unless a passerby stumbled by accident on that site. Hoffman said the skeleton now is being examined by an anthropologist at the University of California at Davis in the hope of determining the cause of the death. Meanwhile, he said the police investigation into the girls' disappearance is continuing.
Here is a map showing 901 Georgia Street and St Johns Mine Road.
Images along Saint Johns Mine created by Samuel Dapore-Scwartz.

Additional information:
#1] Established in 1892, Mare Island Golf Club in Vallejo, California is the oldest golf course west of the Mississippi River. Originally built as a 9-hole course,  its first 30 years included sand greens and dry fairways. The course began near the former Marine Barracks and proceeded south to Lake Rodgers (built in 1876 and named after Rear Admiral Rodgers), then returned to the start. http://mareislandgolfclub.com/history.
#2] San Francisco Chronicle July 31st 1969 "Dear Editor This is the murderer of the 2 teenagers last Christmass at Lake Herman + the girl on the 4th of July near the golf course in Vallejo."
#3] Enlisted Men's Club on Mare Island at the Naval Inshore Operations Training Center.

Was the killer a serviceman with golfing ties, who knew this quiet retreat near Blue Rock Springs golf course was the ideal dumping ground for a body, just a short distance from the road.

California Maritime Academy, located Vallejo California. 1960s graduates.  1950s graduates.  All.

In 1975, an FBI document detailed a possible Zodiac correspondence, which has become known as the 'Equinox' letter.
The slip of paper was yellow in color and the message was largely handwritten in blue felt tip pen. The style of the writing has more in common with the Zodiac 'Red Phantom' letter rather than his copious other earlier communications, nevertheless it is interesting for a number of reasons, other than the obvious astrology connection.
A man from Fresno, California, handed it in to law enforcement and stated that 'over the July 4th 1975 weekend he had visited his brother-in-law at his residence in Oakland, California. During the visit his brother-in-law had showed him a 1968 Datsun 1600 sports car bearing California license plates, which he said had been given to him a week before by a co-employee. The car had not been driven for some time and had no 1975 registration tags. In the front floorboard of the vehicle he found the enclosed note among some newspapers and other discarded papers. He said he read a good deal about the Zodiac murder case and feels this note may have been written by Zodiac. He advised he further suspects that his brother-in-law may be involved because of his hippy-type life style and because his brother-in-law once told him he was at the scene of the taxicab driver murder in San Francisco the night it occurred and made very discouraging remarks about the police investigation into the matter. He advised he reported this to the Fresno Police Department but did not feel that anything was done with the information, and he, therefore, contacted the FBI with his present information.'       

The note began with EQUINOX 3:33 pm.
The note appeared to be almost three years old, based on the date September 22nd 1972, offered on the next line.
A quick check of the September 22nd Equinox in 1972 for Oakland, gives us a Pacific Daylight Time (PDT) of 15:32 or 3:32 pm, almost the exact time displayed on the 'Equinox' letter.
At the foot of the note the author has highlighted in bold capitals 'FULL ARIES MOON.' September 22nd 1972 was a full moon. September 22nd is the final day of Virgo in the horoscope calendar. 
The 14th April (4/14/41) falls under the ARIES sign, but there was no full moon in 1941 for this date. It was a full moon on April 11th 1941 in Aries.
It was a new moon on October 11th 1969 when Paul Stine was murdered in San Francisco. 
Seemingly Phil G was an Aries and September 22nd 1972 was a full moon.
The note began with "Equinox 3:33 pm. Can't make it Sat. Nite but the spell is broken & I hope I'll see you more than ever?"
Just under three months prior to this letter Edward J Salmina, sports editor of the Novato Advance received a hand-printed 'death note' signed Zodiac. The newspaper article of June 30th 1972 read 'The hand-printed letter said: "If you leave your house past 3:13:47 on the next ten Saturdays, you will be killed." In the lower left corner under the heading "message" were a series of symbols. Salmina of 25 Crescent Lane told police he didn't know who or why anyone would send him such a letter.'  Crescent Lane is situated in Novato, Marin County, approximately thirty miles from Oakland (where the brother-in-law lived).
The two similarities between the 'Equinox' note and the 'Death' note sent to Edward J Salmina were firstly, the time presented on each correspondence. The first note, sent just prior to June 30th 1972 stated a time of 3:13:47, the second note on September 22nd 1972, a time of 3:33 pm. only 19 minutes difference. The second similarity was the mention of Saturday in both notes. Incidentally, ten Saturdays from the date of the 'Death' note would have been September 2nd 1972, twenty days before the 'Equinox' note. 

The third event in this 30 mile radius was the attempted murder of Isobel Watson. 
Isobel Watson (33) had just got off the bus on the evening of April 7th 1972, and was walking home along Pine Hill Road, Tamalpais Valley, Marin County at 9.00 pm, when a light colored vehicle veered towards her, knocking her to the ground. [view on google maps]. The driver exited his vehicle offering to take her home, but after she had refused his offer of apparent help a second time, the concerned citizen suddenly became enraged, pulling out a knife and stabbing the woman in the neck and shoulder. ​Her screams alerted the neighborhood, forcing the assailant into a hasty retreat from the scene.
She was treated at Marin General Hospital and fortunately survived the brutal attack.
Her description of the man alerted investigators to a possible Zodiac connection, that of a man with heavy rimmed black glasses, in his early 40's, 5' 9" in height and short brown hair. It was not overlooked by police that the killer had attempted to lure the woman into his vehicle, not dissimilar to the method employed in the Modesto abduction of Kathleen Johns. 
These are three unlikely Zodiac connections, however all three occurred in relatively close proximity to one another within a six month period. 

www.zodiackillersite.com/viewtopic.php?f=78&t=169
http://www.zodiackillersite.com/viewtopic.php?f=78&t=1969
http://www.historyofnovato.com/s-vips

Eighteen years before the murder of Cheri Jo Bates in Riverside, California, on February 8th 1948, another senseless murder was perpetrated on a young woman in Riverside County. Marjorie Lee Winn (17), a Redlands High School student, was traveling with her companion Jim Sloan Jr in his Mercury Coupe along Highway 99, just past Beaumont, at around 2.30 am, when they pulled over for a brief moment. Suddenly a man yanked open the passenger door of his Mercury Coupe and pointed a shotgun at Marjorie. Jim Sloan stepped on the gas to pull away and the gun discharged, leaving the young student with what would prove fatal injuries.
On the evening of the 7th,  Albert Strickland had been drinking at a bar located on 14th Street and Howard Avenue in Riverside, when his vehicle, carelessly parked outside with a loaded shotgun lying on the seat, was stolen. The bar was situated only four minutes drive, or one mile from the Terracina Drive alleyway where Cheri Jo Bates would ultimately be murdered in 1966.
Sometime after 1.00 am Adolph Eilts and his wife were disturbed in their Beaumont home by an intruder carrying a flashlight. Confronted by the home owner the man fled, but when the homeowner went outside he discovered the abandoned Packard of Albert Strickland minus the shotgun. Just over an hour later Marjorie would be dead. After the murder of Margie Lee Winn, a massive manhunt ensued, becoming headline news, yet the killer was never identified. An unsigned 'confession' letter was received by Redlands Police Chief A.O. Peterson stating ​"I killed M. Winn because I loved her. I am traveling north by Greyhound bus. I bought my ticket from a bus driver by the name of Mr. Lee in Los Angeles." An anonymous caller to Riverside Police Department led to the discovery of a pair of size seven shoes in a vacant lot, that matched the impressions taken from the location of the murder and therefore were determined by police to be those of the killer.
Prime suspect Richard Olsen (25) admitted to being the author of the anonymous letter, however, he denied the murder, and despite wearing size seven shoes was eventually ruled out by police in the murder of Margie Lee Winn. 
The murder in Beaumont was perpetrated approximately 26 miles east of the Riverside City College library and has some overlapping characteristics to the Zodiac Killer and Cheri Jo Bates, but this is extremely unlikely to be connected to either, having the hallmarks of robbery, rather than premeditated murder. To read more in depth on this murder please visit 
​http://tonimomberger.weebly.com/the-unsolved-killing-of-margie-lee-winn.html

Desert Sun Newspaper -November 10th 1969: Arsenic Is Found In Soft Drink MARTINEZ (UPI)-- 'A young schoolteacher who received threatening telephone calls for 10 days thought the caller was a crank who was pretending to be the Zodiac killer. But police took the threats seriously after 24-year-old Daniel Williams found a lethal dose of arsenic in a bottle of soft drink in his refrigerator. Williams, a teacher at Salesian High School in Richmond, told police the caller talked of how he intended to kill several persons, then last; Sunday said: “You’re the dead duck.” Williams went out and when he returned home found someone had pried open the screen on a back door. However, a police search showed nothing was missing. But after the officers left and Williams took a drink from a bottle of opened soft drink in his refrigerator, he found it tasted “metallic” and immediately spit it out. Police reported Friday that the bottle contained more than enough arsenic to kill a human being. Williams said the caller identified himself as the still sought Zodiac killer of five, but police discounted the idea. The caller would “sob and complain of headaches.” Williams said, and on one occasion said he had gone to a Martinez school in search of victims but left when he found police there. Williams said the caller told him: “I’m too smart for them.” link
The San Francisco Chronicle ran an article on the same subject on November 8th 1969, stating "The string of sadistic calls began on October 23rd. On one occasion, the caller told Williams he had gone to a Martinez school in search of victims but had left when he found police there. Another time, the teacher said the caller, whose voice he described as muffled as if speaking through a handkerchief, said he was going to "kill the lady in the blue house."  
The arsenic laden drink was discovered on November 2nd 1969. This may not have been the Zodiac Killer, however this threat was seemingly backed up. 
The article ran in the San Francisco Chronicle on November 8th 1969, so if this was the Zodiac, he may have been unaware at the point he mailed the 'Dripping Pen' card on November 8th, on whether his deadly attack had been successful. He mailed the "poison pen" letter on the same day and declared "I thought you would need a good laugh before you hear the bad news. You won't get the news for a while yet." Clearly, had Daniel Williams died from the poisoning, he may not have been discovered immediately. The style of attack would also conform to Zodiac's new declaration on November 9th, in that "I have grown rather angry with the police for their telling lies about me. So I shall change the way the collecting of slaves. I shall no longer announce to anyone. When I committ my murders, they shall look like routine robberies, killings of anger, + a few fake accidents, etc".     
The threatening phone calls and attempted murder of this high school teacher would precede the second cipher offering from the Zodiac. An offering accompanied by what could be interpreted as a "poison pen" letter. The Zodiac Killer's first cipher was cracked in a matter of days by Donald Gene and Bettye June Harden. Don Harden began teaching at North Salinas High School in 1960.  

There is slim chance this was Zodiac, but it doesn't hurt to explore every angle.
Martinez and Richmond, California, where Daniel Williams lived and worked are direct routes from Vallejo and Benicia through to San Francisco. The threatening caller stated he was going to "kill the lady in the blue house." So if the caller was Zodiac, however small the likelihood, what is the reasoning behind this threat, and was he familiar with the woman or the area in question.
The famous "blue house" is situated in the Castro District at 3841 18th Street, San Francisco, near Haight-Ashbury and the Golden Gate Park. It is 3.4 miles southeast of the October 11th 1969 murder of Paul Stine, a month earlier.
It was memorialized in music by French singer Maxime Le Forestier in 1971, inspired by his time living in the blue house with a hippie commune called "Hunga Dunga."
'Maxime Le Forestier spoke of the house where everyone was welcome, where Tom, Phil and Psylvia lived. The house was in fact home to the Hunga Dunga commune, and several of the people mentioned in the song still live in the Bay Area'. Mission Local. 
Could Daniel Williams have been Zodiac's intended eighth victim, and was the 'Bus Bomb' letter on November 9th 1969, stating "This is the Zodiac speaking up to the end of Oct I have killed 7 people" so precisely, indicative that an eighth victim was yet to be discovered, somewhere between October 31st 1969 and the date of this letter. 
The fact that Zodiac made a point of highlighting the "end of Oct" in the Bus Bomb letter, rather than just stating "to date I have killed 7 people" is extremely suggestive that we hadn't "heard the bad news yet".  

http://www.zodiacciphers.com/zodiac-news/skeleton-in-the-closet

On December 20th 1969 the Zodiac Killer mailed the 'Melvin Belli' letter containing a third piece of Paul Stine's shirt, the murdered taxicab driver in Presidio Heights on October 11th 1969. The 'Dripping Pen' card and 'Bus Bomb' letter were postmarked within a day of each other, so this was effectively the third mailing in a row harboring a sinister 'trophy'.
The 'Melvin Belli' letter, whether a ruse or not, painted the picture of a Zodiac Killer going off the rails. In the correspondence he stated "I cannot reach out for help because this thing inside me wont let me. I am finding it extremely difficult to hold it in check. I am afraid I will loose all control again and take my nineth and posibly tenth victom. Please help me I am drownding," Later he continues "But if I hold back too long from no nine, I will loose all controol of my self and set the bomb up. Please help me I can not remain in control for much longer." 

This letter had very similar overtones to the murders attributed to William Heirens, known as the Lipstick Killer, who was convicted of three murders over a seven month period. Josephine Ross had been stabbed numerous times in her apartment at 4108 North Kenmore Avenue on June 5th 1945. Frances Brown was discovered on December 10th 1945 at her 3941 North Pine Grove apartment, again in Edgewater, Chicago. She had multiple knife wounds. In fact a knife was found present in the victim's neck, along with a bullet wound to her head. But on this occasion the killer had left a calling card, in the form of a message written in lipstick on the wall. It read: "For heavens Sake catch me Before I kill more I cannot control myself."
On January 7th 1946 six year old Suzanne Degnan disappeared from her 5943 North Kenmore residence. A ladder was discovered outside the girl's window, and a ransom note was also found by police. The misspelled note read: "GeI $20,000 Reddy & wAITe foR WoRd, do NoT NoTify FBI oR Police. Bills IN 5's & 10's." Later an anonymous phone call was received instructing police to check the sewers and subsequent searches found dismembered body parts of Suzanne Degnan at various locations.
Considering the Zodiac Killer's apparent fragile state of mind in the 'Melvin Belli' letter and its allusions to the William Heirens murders, was there a possibility the Zodiac Killer's next murder would carry any of these traits, and be referenced in his following communication. That is, writing on the wall, the use of a knife in the murder, possible dismemberment and a San Francisco connection.
On April 19th 1970 the mutilated body of Robert Salem was discovered in his 745 Stevenson Street, San Francisco apartment. In an article by Paul Avery entitled 'The Bloody 'Satan' Murder' it reported that they didn't believe it to be a Zodiac murder "The 40 year old designer of lamps had been repeatedly stabbed with a long-bladed knife. The killer had apparently tried to decapitate his victim and when that failed he cut off Salem's left ear, carrying it away with him when he fled. There was also this bizarre touch: scrawled on the wall in Salem's blood, were the words "Satan Saves."  The killer then in larger letters wrote "Zodiac" and drew a strange symbol resembling a crucified man. The same symbol had been drawn on Salem's stomach."   

Remember we stated that based on the 'Melvin Belli' and William Heirens murders, the next crime may contain components of these, such as: ​writing on the wall, the use of a knife in the murder, possible dismemberment and a San Francisco connection. The murder of Robert Salem had them all, and the Zodiac signature in blood. 
One curious feature in the crime scene, is the killer, had he wrote "Zodiac" similar in size to "Satan Saves", there would have been no need to write Zodiac in such fashion, split into two parts, so he could fit it onto the wall. Unless it was intentional. In the article it stated "An autopsy yesterday morning showed Salem was slain sometime last Wednesday."
This puts the murder on April 15th 1970, five days before the Zodiac Killer mailed the 'My Name is....' letter and '13 Symbol' cipher, postmarked April 20th 1970.     

In a previous article, an avenue was explored that may connect the '340 Symbol' Cipher and '13 Symbol' cipher using the Zodiac's name. It is well recognized that the Zodiac Killer was an egotist, with inflated self importance, who just may have given us his pseudonym at the foot of the '340' cipher. It is written slightly differently, but nevertheless it was believed that this may have been a clue. When the correct spelling of Zodiac was placed under it and a numerical value was obtained, by alphabetically counting the difference between the six columns, it generated 0, 0, 0, 8, 8, 8. The three circled 8's he carried forward to his following '13 Symbol' cipher.
See this article to read more. This effectively splits Zodiac into two halves, shown by the pink line in the diagram on the right. Exactly what the killer did on the wall of Robert Salem's 745 Stevenson Street apartment, situated a mile drive from Union Square, the location where it is believed Paul Stine picked up the Zodiac Killer shortly before his murder. The number 888 in Christian numerology represents Jesus or sometimes more specifically Christ the Redeemer. In view of the killer writing "Satan Saves" rather than "Jesus Saves" is there any connection. 
On the April 20th 1970 'My Name is...' letter, the Zodiac signed off with  "PS I hope you have fun trying to figgure out who I killed."​​​ Look at the way the killer wrote "Zodiac" on Robert Salem's wall. Is that designed to look like the 'figgure' 201.

#1 Stanley Dean Baker confessed to the murder of Robert Salem, despite no evidence linking him to the crime, and he was never charged by police. ​http://murderpedia.org/male.B/b/baker-stanley-dean.htm.

#2 The crucified image on the wall of Robert Salem's wall, is the Egyptian ankh. The ankh appears frequently in Egyptian tomb paintings and other art, often at the fingertips of a god or goddess in images that represent the deities of the afterlife conferring the gift of life on the dead person's mummy; this is thought to symbolize the act of conception. Wikipedia.

On April 30th 1967 the supposed killer of Cheri Jo Bates mailed three handwritten letters to Joseph Bates, the Riverside Press-Enterprise and the Riverside Police Department. All effectively carried the same message "Bates had to die there will be more." These letters bore resemblance to the Zodiac Killer's first three letters, mailed to the San Francisco Chronicle, Vallejo Times-Herald and San Francisco Examiner.on July 31st 1969. Not only did both sets contain three constituent parts, they exhibited double postage and both carried the threat of more victims. In the July 31st 1969 mailings, the threat was to "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 two sets of letters were also accompanied by a symbol at the foot of the correspondence. The crosshairs of the Zodiac Killer are all too familiar, but what were the strange symbols at the foot of the Riverside Police Department and Riverside Press-Enterprise correspondence. They do not appear to be a regular letter Z, as both have an elaborate tail off the left side, as shown in the above image.  
The Zodiac Killer was not averse to placing his running total of victims at the foot of each letter, and this may be the case in the Bates letters. In one of Zodiac's mailings he sent us the 'Halloween' card addressed to Paul Avery, but possibly replaced the victim count with an elaborate symbol on the inside of the card. We know he was inferring 14 victims over the entire card, so why should the symbol be any different. Below is a depiction of one possible interpretation.         

The four dots are harder to interpret, but by joining three alphabetical letters together 'Zodiac Victims Fourteen' is realized. Was this a 'modern' twist on his earlier, yet more rudimentary version on the Bates letters.
On first glance the Bates symbol could be interpreted as a joined 3 and V, indicating three victims. After all, the murderer of Cheri Jo Bates was claiming previous victims, apparent in the 'Confession' letter he mailed one month after her murder. It stated "She is not the first and she will not be the last. I lay awake at night thinking about my next victim." The question is, were his next victims that of David Faraday and Betty Lou Jensen on December 20th 1968, just two years later.
The Zodiac Killer first gave us a running total of seven on the 'Dripping Pen' card, mailed on November 8th 1969. The Zodiac claimed "Des, July, Aug, Sept, Oct = 7" at the foot of the card. At this point in time we knew of five Zodiac murders, that included David Faraday and Betty Lou Jensen in December, Darlene Ferrin in July, Cecelia Shepard in September, and Paul Stine in October. We were missing two.
If we also included Cheri Jo Bates into October, then we would be missing only one victim in August. If the Zodiac Killer was the murderer of Cheri Jo Bates, then was his first victim just two months earlier in August 1966 and Cheri was "not the first and was not to be the last." This would give us the total of seven victims the Zodiac was referring to in the 'Dripping Pen' card. Is it possible the Zodiac Killer had already adopted his pseudonym as early as 1967, bearing in mind the symbol on the Bates letters does not conform fully. 
One interpretation of the Bates symbols could have inspired his design on the 'Halloween' card, shown below. The number 2 (or possibly 3) tagged onto the left side of the arrangement, as opposed to 'fourteen' on the 'Halloween' card, tagged onto the right side.  However it may be a little convoluted, and would presuppose his use of the pseudonym Zodiac in 1967, which could not be backed up with anything tangible.          

​Assuming the Bay Area and Riverside killer are the same person, it is conceivable that the murder of Cheri Jo Bates was one of his earliest crimes, possibly the second. The 'Confession' letter stated "She is not the first and she will not be the last," and the 'Dripping Pen' card total, if to be believed, left only one victim in August.

Had the murderer of Cheri Jo Bates killed a second victim, only two months earlier in August. His murders may have displayed much less organization back in 1966, exemplified by the brutal stabbing in the grounds of the Riverside City College, only yards from the library annex. His letter writing may equally have looked amateurish, after all, he was in the infancy of his terror.
On the right may be an early example of the Zodiac Killer's running victim total, inferring '2 victims' (or possibly '3 victims').
However, we were two murders short on the 'Dripping Pen' card, so this coupled with the five murders in the Bay Area brings us to the correct total of seven, by November 8th 1969. The total on the 'Dripping Pen' card may only be crimes under the Zodiac umbrella, which he adopted in 1969, which do not include any of the Riverside attacks. Nevertheless, the Bates symbols may still be an early example of a running victim count, which he refreshed when he became Zodiac. If this is the case, then the hunt for victims six and seven will have to start again, maybe somewhere other than Riverside. 

In the November 9th 1969 'Bus Bomb' letter the Zodiac Killer was clearly agitated by the response he received after mailing the Paul Stine letter on October 13th. In it he stated "This is the Zodiac speaking up to the end of Oct I have killed 7 people. I have grown rather angry with the police for their telling lies about me. So I shall change the way the collecting of slaves. I shall no longer announce to anyone. When I committ my murders, they shall look like routine robberies, killings of anger, + a few fake accidents, etc." The newspaper article that upset him featured Chief of Police Martin Lee, who stated in the San Francisco Chronicle article on October 18th 1969 entitled 'Zodiac Called a Clumsy Criminal,' that Zodiac possibly left his fingerprints on the taxicab, allowed himself to be spotted by three teenagers, and failed to kill all his victims. He went on say "His boast of being in the area we were searching is a lie. We had the whole area flooded with lights. We had seven police dogs and a large number of patrolmen searching the area tree by tree and bush by bush. The dogs are the best in the country. A mouse couldn't have escaped our attention."
The question was; had the Zodiac already attempted or carried out a crime after the October 18th 1969 article that was designed to look accidental or natural, but had possibly failed. After all, his victim count remained at seven by the end of October, which he corroborated in the Dripping Pen Card on November 8th. To do so, we would have to look at attempted crimes, claimed by the 'Zodiac Killer' between October 18th and November 8th, in a relevant location.
As seen on the left, a Salesian High School teacher, Daniel Williams had his house broken into, but nothing was taken. A man claiming to be the Zodiac Killer made several threatening phone calls beginning on October 23rd 1969, culminating with the caller saying "You're the dead duck" on November 2nd 1969. Later that day Williams took a drink from the refrigerator, but fortunately spat it out after noticing a metallic taste. The drink contained enough arsenic to kill.
This in all likelihood is not the Zodiac Killer, however the targeting of a school teacher is interesting, bearing in mind a Salinas High School teacher, Donald Harden cracked his first cipher, and his 'Dripping Pen' card and second cipher was to arrive in just six days. It could also be argued that this attempted murder, had it been successful, may have looked 'accidental', as the Zodiac would state in the 'Bus Bomb' letter.
Daniel Williams residence was situated at 1234 Bush Street, Martinez, only 9 miles from the location of Zodiac's first crime at Lake Herman Road.
The mystery man during one of his calls talked of "killing the lady in the blue house," but as of yet the meaning behind this utterance is undetermined. 
Bearing in mind the October 22nd 1969 Jim Dunbar radio show, in which Zodiac was supposed to call in, it is hardly surprising we may get a crank call by somebody claiming to be Zodiac beginning on October 23rd 1969. The only difference here, was it appeared the caller was prepared to back up his threat with action. The original caller to the Oakland Police Department at 2.00 am on October 22nd 1969 may however not be the same person as the hoaxer, who ultimately called the Jim Dunbar show and spoke to Melvin Belli.

​The phrase 'dead duck' may originate from "Never waste powder on a dead duck," first recorded in 1829. Bearing in mind the use of arsenic powder, an ironic choice of words. 

The Pines Card, often questioned on its authorship, was mailed to the San Francisco Chronicle on March 22nd 1971. Was this a Zodiac correspondence offering subtle hints to the disappearance of Donna Lass (25) from the Sahara Tahoe Hotel and Casino on September 6th 1970. If we traveled the 'lake tahoe areas' on the western shore of Lake Tahoe, we would arrive at Donna Pass and the Donner Memorial State Park on its northern edge, by Truckee, California. Could this be the final resting place of Donna Lass, buried 'in the snow.'
Two years earlier Wanda Gail Loe (26), similar in age to Donna Lass, disappeared from the Lake Tahoe region on July 27th 1968, five months prior to the Lake Herman Road murders. She worked at the Sunnyside Resort 1850 West Lake Boulevard in Placer County. The resort is 30 miles northwest of the Sahara Tahoe Hotel, now the Hard Rock Hotel and Casino, where Donna Lass was last seen.
​Her boyfriend Dennis Finn allegedly made a drunken confession to the crime, according to his cousin, however ill feeling between the pair has cast huge doubt on his claims, and no evidence exists linking Dennis Finn to the crime. Later arrested and jailed for an unrelated crime, he committed suicide in 1992.
Were the disappearances of Donna Lass and Wanda Loe connected in any way, and if so, how relevant is the Zodiac Killer or Pines Card to either investigation.
The disappearances were two years apart, their ages were similar and they worked on the fringes of Lake Tahoe, only 30 miles apart. An officer involved in the Wanda Loe case, Sergeant Perea, believed she may be buried in the Carpenter Valley area, near Truckee. Carpenter Valley Road is a mere four miles from Donner Lake and Donner Pass Road.  

The following is not meant to indicate any Zodiac connection, but its locality in relation to the Donna Lass case is worthy of mention.  
Approximately eleven years after the disappearance of Donna Lass, on January 12th 1982, two young women, Julie Schossow (25) and Marilyn Putt (27),  disappeared from South Lake Tahoe. Their bodies were recovered several months later.
​On June 6th 1982 Marilyn Putt's body was found in the South Fork of the American River, one mile west of Chili Bar. The police press release stated “Her body had been weighted down with chains and binding material and the cause of death appears to be ligature strangulation, with the time of death being estimated at six to eight weeks prior to her body being found.” Julie Schossow was discovered only a short distance away on July 9th 1982. The women had been bound and strangled with a ligature. Both victims worked as blackjack dealers at Harrah's Lake Tahoe Casino and were last seen leaving the Rendevouz Bar at Harrah's around midnight. This casino is only 359 meters from the Sahara Tahoe Hotel and Casino, where Donna Lass had worked in 1970. Reports circled about a possible interaction with some men, indicating that the women may have traveled with them to the Bay Area, although this is unsubstantiated.  

https://www.youtube.com/watch?v=pO5PxH6rFeE
​http://www.tahoedailytribune.com/news/information-sought-in-1982-south-lake-tahoe-killings/
​http://www.websleuths.com/forums/showthread.php?309900-CA-Julie-Schossow-25-amp-Marilyn-Putt-27-S-Lake-Tahoe-12-Jan-1982