This letter mailed to the Vallejo Times-Herald is similar to the San Francisco Chronicle and San Francisco Examiner letter and contained Part 1 of the three ciphers, which totaled up to become known as the 408 cipher, due to each part containing 136 characters.
The letters claimed credit for the first two attacks at Lake Herman Road on December 20th 1968 and Blue Rock Springs Park on July 4th 1969.
Betty Lou Jensen and David Faraday died in the Lake Herman attacks, but in the following encounter with the Zodiac at Blue Rock Springs, Michael Mageau survived despite being shot multiple times, unfortunately though Darlene Ferrin was not so lucky.
On August 8th 1969, just over a week after the arrival of the three letters, the 408 cipher was cracked by Donald Gene and Bettye June Harden of Salinas, California, who both used homophonic substitution to identify a solution.
The decoded cipher turned out to be the killer's thoughts and ramblings, containing numerous spelling errors, either by design or otherwise, but despite the letters claiming he would reveal his identity it turned out he was not so forthcoming. See also;
San Francisco Examiner and Part 2 of Cipher
San Francisco Chronicle Letter and Part 3 of Cipher
I like killing people because it is so much fun it is more fun than killing wild game in the forrest because man is the most dangerous animal of all to kill something gives me the most thrilling experence it is even better than getting your rocks off with a girl the best part of it is that when I die I will be reborn in paradice and all the (people) I have killed will become my slaves I will not give you my name because you will try to slow down or stop my collecting of slaves for my afterlife ebeorietemethhpiti .
I am the killer of the 2 teen-agers last Christmass at Lake Herman and the Girl last 4th of July. To Prove this I shall state some facts which only I + the police know.
1 Brand name of ammo Super X
2 10 Shots fired
3 Boy was on back feet to car
4 Girl was lyeing on right side
feet to west
4th of July
1 Girl was wearing patterned Pants
2 Boy was also shot in knee
3 Brand name of ammo was Western
Here is a cyipher or that is part of one. the other 2 parts
have been mailed to the S.F. Examiner + the S.F. Chronicle I want you to print this cipher on your frunt page by Fry Afternoon Aug 1-69, If you do not do this I will go on a kill ram page Fry night that will last the whole week end.
I will cruse around and pick of all stray people or coupples that are alone then move on to kill some more untill I have killed over a dozen people.