Zodiac Timeline
October 30, 1966 Cheri Jo Bates is murdered.
December, 1966 A poem about killing carved in a desk at Riverside City College Library
April 30, 1967 3 letters sent regarding victim Cheri Jo Bates.
One letter sent to Riverside Press Enterprise.
A second letter sent to Cheri's father Joseph Bates.
A third letter sent to Riverside Police Department.
December 20, 1968 David Faraday and Betty Lou Jensen are murdered.
July 4, 1969 Darlene Ferrin and Mike Mageau are shot. Darlene dies, however Mike survives.
July 31, 1969 3 letters sent regarding the Faraday/Jensen and Shepard/Hartnell with details of the crimes.
One sent to the Times-Herald.
A second letter sent to the Chronicle.
A third letter sent to the Examiner.
Each letter contain the same message however each letter comes with a different cipher. The ciphers were cracked and reveal a maniacal message about how he enjoys killing
August 4, 1969 The author calls himself Zodiac, and gives more details of the crimes.
September 27, 1969 Cecilia Shepard and Brian Hartnell are stabbed multiple times at Lake Berryessa while picnicking. Cecilia died around a day later, however Brian survived and was able to provide a description of Zodiac's bizarre costume.
October 11, 1969 Paul Stine is shot in the head and dies instantly in his cab.
October 13, 1969 A letter is sent with a piece of Stine's bloody t-shirt.
November 8, 1969 Dripping pen letter.
November 9, 1969 Bus Bomb letter. He also writes about how he got away from the police during the Stine shooting.
December 20, 1969 Zodiac sends a letter to attorney Melvin Belli asking for help. To prove he is the Zodiac, a piece of Stine's bloody shirt comes with the letter.
March 22, 1970 Kathleen Johns is abducted by a man who looked like the Zodiac. Kathleen jumped out of the car and got away. The man went back and set her car on fire.
April 20, 1970 "My name is" letter with a cipher.
April 28, 1970 Dragon card.
May, 1970
June 26, 1970 Letter with bus bomb location cipher.
July 24, 1970 Mikado letter.
July 26, 1970 Zodiac takes credit for the Kathleen Johns abduction from March 22, 1970. He also describes other possible future victims but does not gives their names.
September 6, 1970 Donna Lass disappears and is never found.
October 27, 1970 Halloween card.
March 13, 1971 Zodiac claims to be crack proof.
January 29, 1974 Exorcist letter.
May 8, 1974 The author calls himself "a citizen".
July 8, 1974 The author calls himself "Red Phantom".
April 24, 1978 The letter states "I am back with you". However this letter is believed to be forged, possibly an inside job.
Link
http://www.olesin.50megs.com/zodiac/timeline.htm