I reached a possible solution on the possible Zodiac cipher of 12/7/69. This is from the ZK board.http://zodiackillertruth.com/images/fbi/cs4fbi.pdf
Relevant docs about 1/5 of the way down. They are generally organized by date. Generally from page 30 to 70. Cipher info on page 53 - 63.
FBI did try to decipher the 12/7/69 cipher, in conjunction with the 340. They note the 12/7/69 may be too short to translate. They did try using the Harden translation on both the 340 and the 12/7/69, with limited results. They note there are many new symbols - about 20% - that do not appear in Harden. They mention it may have word anagrams.
They list these possible translations:
+ L, T, S, R, O and E
9 or P (backwards) O
Dot in Triangle K, F (A, S in Harden).
Other tidbits include request by police to check fingerprints in FBI ID Bureau of 18 persons, listed as "veterans" "white male Americans" suggestion of "mental disorders" and named as "suspects". As none are mentioned to have arrest records, perhaps they assumed FBI could check their military record for prints, as all are listed as "veterans". It is not clear if all had prints on record, but no matches are noted. Other persons were checked as they were noted as "sex deviates", "member of Communist Party", "interested in astrology" and/or a "loner." All names are blacked out.
Deer Lodge, Montana was briefly discussed in regards to Zodiac having named it on 9/27/69. A former inmate from the prison there is mentioned. Interestingly, that summer of 1969 TJK had traveled through Montana looking for land to buy with his brother, and he is quoted mentioning how beautiful he thought Montana was. Deer Lodge is about one hour away from where TJK bought his cabin in 1971.
The files also mention the paste up cards, with many astrology charts and info, regarded as possible Zodiac mailings. It states that handwritten on one of the cards are the words "Flight 555", and some other words I can't make out. "PM"?
Interestingly, TJK on 11/15/79 put a bomb on Flight 444 from Chicago to New York. 12 were treated for smoke inhalation and the plane made an emergency landing. The FBI stated that had the bomb detonated correctly it would have destroyed the plane. On 6/27/95, TJK sent a letter to the SF Chronicle threatening that a flight out of LAX would be blown up in the next six days. The FBI stated this "paralysed nationwide air travel over the long Fourth of July weekend." That was the 26th anniversary of the Zodiac attack on 7/4-5/69. A TJK bomb also went off at UCAL Berkeley on 7/2/82, two days prior to the 13th anniversary of that Zodiac attack.
T E W C T S E N H N T T
I O K R E L T E E D O E
E I E K E Y I Y N N L S T E
T E W C T S E N H N A A
I O K R E L T R R D O P
P I E K E Y I Y N N L S T R
Using basic "ETA" frequency chart and general code solving principles, my first translation has too many "T" 's and "E" 's and not a single "A" or "P" and only one "R". "A" is the third most used letter in the English language, and it would be very difficult to form any kind of coherent English paragraph without, so I was no doubt wrong to rely so strictly on Harden 408 and general 340 solves.
So I now propose solving the "LL" as "AA" instead of "TT". As it seems fairly clear we have an anagram here, and the FBI treated it as a probable anagram, I will not be overly wed to the fact that LL and TT are frequent doubles and AA is not. If it is a real code, must have some "A" 's to form words, and it would be a nice fake for Z to trick us into thinking it is a non-anagram and thus sticking with LL=TT, as I first did. We still have too many "E" 's. The FBI mentions multiple possible translations for "+", including "R". So lets go with that, because we have only one "R" and likely need more to form words. We also lack a single letter "P", so I will solve the backwards "9" or backwards "P" (can't tell from poor copy) as a "P".
Last line could anagram as:
STINE KEY IN PRYLN
Entire translated code can anagram as:
STINE KEY WALLET IN CHERRY PRESIDO PARK
Left over are: T T N N O
Can anyone double check my work and my anagrams? Are they correct?
This above sentence closely matches a part of my multi step 340 solution, which gives an even more specific location.
The above sentence is unlikely to be mere coincidence. It seems intentional, and could be the work of a very smart hoaxer, or it is a real message from Zodiac.
Going against it being a hoax is the fact that it matches my multi step solution to the 340, except the 340 gives a more specific location.
I am kind of amazed at this. I thought it 50/50 at best that this was a real Z cipher. I need to look this over and make a detailed comparison with my 340 solution, and recheck all this work. I don't quite know what to make of this. I really did not expect to get any sort of clear message.
What do other people think of this? Could this be the first publicly deciphered Zodiac code since Harden? Could it be a coincidence that those words come up? Is it a hoax cipher? Or is it real?
I think about 90- 95% of the symbol translations are either from Harden solved, 340 solves from ZK archive board and FBI report, which I just found a few hours ago.
Can anyone please check my work? Other than the backwards 9 or P solved as a "P", I think everything else pre-exists from Harden, 340 solves, the FBI report or general "ETA" frequency principles, like the "AA". I am not making a claim this is for sure a real Z code, but I can tell you I forced nothing, all my work and steps are here and can be checked.
I will keep working on this, check it against my 340 multi step solve, and wait for confirmation from FBI and police.