The Zodiac Killer would use this "North Bay" reference only twelve days later, after the callous execution of taxicab driver Paul Stine on October 11th 1969 in San Francisco, to confirm his link to Berryessa. The Zodiac Killer mailed a letter to the San Francisco Chronicle with the admission "I am the same man who did in the people in the north bay area". The San Francisco Examiner would detail the withholding of part of the message on the car door at Berryessa, stating "There was more to the inked car door message than dates. But Captain Townsend masked the information, considered it "classified". In the September 30th 1969 edition of the Examiner, entitled 'Police Dare Cipher Killer', Captain Don Townsend dared him to write or phone again to prove he wrote the message: "There is more, and we are not releasing it now. Why? Because this man has a pattern of contacting the police and newspapers by phone and letter after his killings. We are holding back part of the note because, when and if he writes, he can say what else was written there - and thus prove he is the 'man who loves to kill'"
The answer lies in the October 1st 1969 San Francisco Examiner edition, where investigators contemplated a link to the brutal stabbing and murder of two young girls in San Jose on August 3rd 1969. Deborah Gaye Furlong (14) and Kathie Ann Snoozy (15) were found murdered in the Bay Area of San Jose, in what can only be described as a barrage of knife wounds. These murders were eventually linked to the hand of Karl F. Werner, who was also convicted of the Kathy Bilek murder. However, these murders were not solved until 1971. The October 1st 1969 Examiner stated "And today San Jose police, to the south, inquired of law enforcement officers here whether there was indication that the "Cipher Killer" might be linked to the knife slaying of two teenage girls Aug.3, still unsolved".
This is exactly what the Zodiac Killer had hoped - and why he perpetrated the Lake Berryessa attack in the first place. He was laying the seeds for law enforcement to conclude this very idea - and the reason he switched to a knife attack on this occasion. The "Aug" reference was pushing law enforcement to conclude he was responsible for the brutal slaying of Kathy Snoozy and Deborah Furlong - "by knife" - and therefore, in his mind, unequivocally linking himself to the Lake Berryessa stabbings. Had Karl Francis Werner not killed Kathy Snoozy and Deborah Furlong, it is my contention that Cecelia Shepard would still be alive today.
The Zodiac Killer knew that he had to kill to secure the attention of the newspapers, and the bolder the attack, the more publicity he would generate. He had murdered three young people by July 4th 1969 and had sent newspapers a trinity of communications on July 31st 1969 containing three parts of a cipher, determined to secure the headlines he felt he deserved. His letters promised more murder 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". To his dismay, he felt he was being short-changed, writing in the August 4th 1969 'Debut of Zodiac' letter "I was not happy to see that I did not get front page coverage". At this point in time, without doubt, the Zodiac Killer would have been scouring the newspapers for progress on solving his cipher, along with updates on his crimes. Then came the savage knife attack on Kathy Snoozy and Deborah Furlong in San Jose, featured on the front page of the San Francisco Chronicle on August 6th 1969:
Dr. John E. Hauser, Santa Clara county's chief medical examiner and coroner, said yesterday that the girls, Deborah Gay Furlong, 14, and Kathy Snoozy, 15, died in a "frenzied flurry of knife-wounds" inflicted so swiftly that neither gave any evidence of having struggled against the attack. Dr. Hauser, so shaken by the brutality of the crime he could scarcely find words, said the Snoozy youngster had 150 wounds on her back, 50 on the front and a "storm" of punctures on her neck. Deborah's body had about 100 wounds on her back and upper front and a dozen on her neck. Dr. Hauser said he was "puzzled" by many aspects of the brutal slaying. He said neither girl had been sexually molested; neither had suffered any wounds below her waist, neither gave evidence of having struggled to escape. Only the Snoozy girl, he said, had one small mark on her hand, suggesting she may have tried vainly to deflect the plunging knife.
The coroner said both girls must have died very quickly and he is investigating the possibility they may have been drugged before the stabbing began. Blood and skin samples as well as stomach contents have been sent for further examination to area laboratories, he said. The results should be known in a few days. It is Dr. Hauser's opinion that the multiple puncture wounds were inflicted by one or two small knives, the largest wound the size of a pocket knife with a half-inch blade. "I've never seen a case with this many stab wounds," Dr. Hauser said. "You know, I've been in this profession a long time and sometimes I think I'm rather callous, but when I saw these girls, believe me it was terrifying. "The Nazi sex mutilations during World War II were nothing compared to what was done to these young girls."
It has been questioned as to why the Zodiac Killer wrote "by knife" on the car door of Bryan Hartnell's vehicle, when it was patently obvious the couple had been stabbed with a knife. But it was much more than this. The writing of "by knife" on the car door was a statement to the publicity he felt he deserved - and was also partly alluding to the Snoozy and Furlong murders he would lay claim to just six weeks later. The "Aug" reference on the November 8th 1969 'Dripping Pen' card was further corroboration to the 'hidden' message on the car door of Bryan Hartnell. The Zodiac Killer attacked Bryan Hartnell and Cecelia Shepard with a knife at Lake Berryessa, then planted the seed on the car door to hint towards the San Jose murders just seven weeks earlier, to which he would finally confirm on his 'Dripping Pen' card at the beginning of November. He knew the month of August would be interpreted by law enforcement as the murder of Snoozy and Furlong, because law enforcement had contemplated the link only weeks earlier. The "by knife" message on the car door at Lake Berryessa, would on November 8th 1969, now hold much more significance than it did on September 27th 1969.
Confirmation of the Snoozy and Furlong "August" link, would arrive on July 13th 1971, when a pasted card was mailed to the San Francisco Chronicle with the words "Near Monticello Shought Victims 21 ...... In The Woods Dies April". The Zodiac Killer was now claiming (or at the very least associating himself with) Karl Francis Werner's third victim, Kathy Bilek. On Sunday, April 11th 1971, Kathy Bilek (18) visited Villa Montalvo in Saratoga, with the intent to read and engage in a spot of birdwatching in the seclusion of a remote, wooded portion of the park, near a small stream. Her body was found the next day by her father, Charles, while Santa Clara County Sheriff's deputies searched nearby. She had been stabbed 17 times in the back and 32 times in her chest and stomach. The Zodiac Killer's requirement to associate himself with three brutal stabbings, despite the fact he wasn't responsible for any, tells you all you need to know regarding his quest for notoriety - and why he was only too willing to write "by knife" on the car door at Lake Berryessa.on September 27th 1969. Its meaning went far beyond the obvious.