The last major article featuring Sgt John Lynch and the 408 cipher, entitled "A Name in Murder Cipher", suggested the name "Robert Emmet the hippie" as one possibility, despite it being too long to accommodate the 18 unsolved characters at the foot of the 408 cipher. At the end of the August 12th 1969 article, Sgt John Lynch stated "We aren't sure Robert Emmet is who we are looking for. Maybe he'll send another letter and let us know". This request from Sgt John Lynch was specifically about the 18 seemingly nonsensical characters remaining at the base of the "murder cipher" and the search for a name. Therefore, the response of the "Good Citizen", stating "On occasion, while thinking of the code letters, the pencil wrote: Go to 56 Beach Street. I get the name Jerry, perhaps he knows people or his name is XXXXXXX", was likely a response to this conundrum. Sgt John Lynch was searching for a name in the 408 cipher, to which the "Good Citizen" replied: "I get the name Jerry" or "his name is XXXXXXX". The October 7th 1969 letter mentioning Beach Street (at the north-eastern edge of Presidio Park), just four days before the Paul Stine murder, is so cryptic in nature, it could be construed as unhelpful and possibly malevolent or mischievous in nature. There is a high degree of probability that the same author was responsible for the "Concerned Citizen" card and "Good Citizen" letter, bearing in mind the August 10th 1969 communication was not in the public domain by October 7th 1969. The two communications both offering answers to the 408 cipher, in addition to the aforementioned similarities. To believe these were authored by separate individuals would require a high degree of mental gymnastics.
Does the name "Jerry" or the grouping of seven X's in the "Good Citizen" letter have any bearing on the 18 unexplained characters at the foot of the 408 cipher, or is it just another wild goose chase? One would like to think that the reference to "Jerry" or "XXXXXXX" had some meaning to its author and had some benefit to Sgt John Lynch, rather than complete nonsense that achieves nothing for the sender. The fact that the "Good Citizen" letter (if Zodiac) appears totally unhelpful and arguably bereft of a reasonable aid to solution, could suggest the 18 unsolved characters have no meaning to be found (in complete contradiction to the code key supplied on August 10th 1969 which did aid a solution). Whatever the case, it is with little doubt that the author of these two communications are one and the same - whether that author is Zodiac or not.