While running experiments through the AZ Decrypt on December 3rd 2020, Dave Oranchak noticed two sections of text which grabbed his attention. A partial message appeared within the array of gibberish of "hope you are trying to catch me" and "or the gas chamber", that ultimately provided the chink of light to finally decode the Zodiac Killer's seemingly impenetrable cipher. The Zodiac Killer usually responded to the recent newspaper articles he had read, so the reference to "gas chamber" in light of the recent Jim Dunbar Show on October 22nd 1969, finally opened the door to a cipher many believed would never be solved. The collaboration between Dave Oranchak, Sam Blake and Jarl Van Eycke was about to bring an early Christmas present to everybody who has followed the Zodiac case for many decades. The dedication of Dave Oranchak in continuing to believe that a possible solution existed, despite the nagging doubts that the cipher may have been non-cryptographic in nature, is testimony to a man who ultimately followed his beliefs and succeeded - and a man that I have huge admiration for. Congratulations to everybody involved in finally decoding the Zodiac Killer's 340 cipher (shown below).
I HOPE YOU ARE HAVING LOTS OF FUN IN TRYING TO CATCH ME - THAT WASN’T ME ON THE TV SHOW - WHICH BRINGS UP A POINT ABOUT ME - I AM NOT AFRAID OF THE GAS CHAMBER BECAUSE IT WILL SEND ME TO PARADICE ALL THE SOONER BECAUSE I NOW HAVE ENOUGH SLAVES TO WORK FOR ME WHERE EVERYONE ELSE HAS NOTHING WHEN THEY REACH PARADICE - SO THEY ARE AFRAID OF DEATH - I AM NOT AFRAID BECAUSE I KNOW THAT MY NEW LIFE IS LIFE WILL BE AN EASY ONE IN PARADICE DEATH.
I HOPE YOU ARE HAVING LOTS OF FUN IN TRYING TO CATCH ME - THAT WASN’T ME ON THE TV SHOW - WHICH BRINGS UP A POINT ABOUT ME - I AM NOT AFRAID OF THE GAS CHAMBER BECAUSE IT WILL SEND ME TO PARADICE ALL THE SOONER BECAUSE I NOW HAVE ENOUGH SLAVES TO WORK FOR ME WHERE EVERYONE ELSE HAS NOTHING WHEN THEY REACH PARADICE - SO THEY ARE AFRAID OF DEATH - I AM NOT AFRAID BECAUSE I KNOW THAT MY NEW LIFE IS LIFE WILL BE AN EASY ONE IN PARADICE DEATH.
The inspiration for this message can be found in the pages of the San Francisco Examiner and San Francisco Chronicle from October 22nd 1969 to October 25th 1969. The first challenge came on the same day (October 22nd) as the Jim Dunbar TV show aired, when Professor D.C.B. Marsh of the American Cryptogram Association challenged the Zodiac Killer "to reveal his name in the cipher to established cryptogram experts, however complicated". The Zodiac Killer certainly made his encryption process more complicated, but unsurprisingly didn't give us his name. However, it appears that this challenge was the catalyst for his second and third cryptograms. The following day, on October 23rd 1969, the San Francisco Chronicle released an article entitled A TV Runaround With Zodiac Calls. Whether the Zodiac Killer watched the Jim Dunbar Show is incidental, because this article (on left) contained the possible inspiration behind the Zodiac Killer stating "I am not afraid of the gas chamber".
The San Francisco Chronicle article on October 24th 1969 headlined with That Wasn't Zodiac, Say 3 Who Know, to which the Zodiac Killer would reply in his message in the 340 cipher by confirming "That wasn't me on the TV show". Then, on October 25th 1969, the San Francisco Chronicle ran another article entitled Cops No Closer on Zodiac Identity, containing the text "Zodiac struck last on October 11 when he gunned down cab-driver Paul Stine on Washington Street in Presidio Heights. He revealed himself the killer in a letter sent to the Chronicle three days later. Since then he has remained silent". The question would be, how was the Zodiac Killer going to respond to the silence attributed to him by Paul Avery? Probably by choosing a greeting card with a Dripping Pen and accompanied by the words "Sorry I haven't written, but I just washed my pen". The increased complexity of the coding used, along with everything the Zodiac Killer wrote in the decrypted 340 cipher, was likely inspired by these four consecutive newspaper articles in October. If the 340 cipher was specifically crafted subsequent to his purchase of the Dripping Pen card, then this more complicated offering was dreamt up between October 25th 1969 and November 8th 1969.
The San Francisco Chronicle article on October 24th 1969 headlined with That Wasn't Zodiac, Say 3 Who Know, to which the Zodiac Killer would reply in his message in the 340 cipher by confirming "That wasn't me on the TV show". Then, on October 25th 1969, the San Francisco Chronicle ran another article entitled Cops No Closer on Zodiac Identity, containing the text "Zodiac struck last on October 11 when he gunned down cab-driver Paul Stine on Washington Street in Presidio Heights. He revealed himself the killer in a letter sent to the Chronicle three days later. Since then he has remained silent". The question would be, how was the Zodiac Killer going to respond to the silence attributed to him by Paul Avery? Probably by choosing a greeting card with a Dripping Pen and accompanied by the words "Sorry I haven't written, but I just washed my pen". The increased complexity of the coding used, along with everything the Zodiac Killer wrote in the decrypted 340 cipher, was likely inspired by these four consecutive newspaper articles in October. If the 340 cipher was specifically crafted subsequent to his purchase of the Dripping Pen card, then this more complicated offering was dreamt up between October 25th 1969 and November 8th 1969.
The excellent work of Dave Oranchak, Sam Blake and Jarl Van Eycke has permanently closed one chapter of the Zodiac Killer story, but has opened many more. "The chase is better than the catch" comes to mind, when that relenting pursuit of something just out of reach is finally taken away. The exhilaration of finally discovering the solution to a 51-year-old mystery, tinged with the realization that the search is finally over. Everybody likes a good mystery. But that mystery is no more.
One new path to pursue, may lie in the three immediate communications following the 340 cipher. Those three being, the November 21st 1969 letter mailed to the San Jose Police Department and the two Fairfield letters mailed on December 7th 1969 and December 16th 1969. All three contained rudimentary coding that may, or may not be clues pertaining to the 340 cipher. The December 7th 1969 code was particularly interesting because it contained 38 characters, many of which ran in sequences mimicking the 340 cipher.
Here is just a simple observation regarding the two December codes in respect to the 340 cipher solution and the reference to "death" on two occasions. If we take a look at the small fragment of code on the December 16th 1969 letter, you will notice that its design somewhat mimics the configuration on the Halloween card. We have five characters, followed by four small crosshairs in each quadrant of the large crosshairs. This had similarity to "paradice" and "slaves" fashioned in cruciform on the Halloween card, accompanied by the four methods of "death" in each quadrant. The Tim Holt comic book, believed to be the inspiration behind the Halloween card, actually carried the full message of "death by knife", "death by rope", "death by gun" and "death by fire". Therefore, the five characters of coding on the December 16th 1969 letter (precedent to the crosshairs) could be the word "death".
One new path to pursue, may lie in the three immediate communications following the 340 cipher. Those three being, the November 21st 1969 letter mailed to the San Jose Police Department and the two Fairfield letters mailed on December 7th 1969 and December 16th 1969. All three contained rudimentary coding that may, or may not be clues pertaining to the 340 cipher. The December 7th 1969 code was particularly interesting because it contained 38 characters, many of which ran in sequences mimicking the 340 cipher.
Here is just a simple observation regarding the two December codes in respect to the 340 cipher solution and the reference to "death" on two occasions. If we take a look at the small fragment of code on the December 16th 1969 letter, you will notice that its design somewhat mimics the configuration on the Halloween card. We have five characters, followed by four small crosshairs in each quadrant of the large crosshairs. This had similarity to "paradice" and "slaves" fashioned in cruciform on the Halloween card, accompanied by the four methods of "death" in each quadrant. The Tim Holt comic book, believed to be the inspiration behind the Halloween card, actually carried the full message of "death by knife", "death by rope", "death by gun" and "death by fire". Therefore, the five characters of coding on the December 16th 1969 letter (precedent to the crosshairs) could be the word "death".
Then I decided to use the plaintext 'solution' of "death" and place these alphabetical characters into the Zodiac Killer's code mailed on December 7th 1969. You will notice that the letters "A" and "H" are both represented by a circle with vertical line bisecting its midsection (which is unfortunate), so I will only use the first four plaintext characters of "DEAT" and place them into the first four corresponding ciphertext characters that appear in the 38 character code on December 7th 1969. It's nothing earth shattering, but this section of the cipher caught my eye.
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