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The Zodiac Killer was a serial killer who operated in Northern California from at least the late 1960s to the early 1970s. His identity remains unknown.
The name was coined in a series of taunting letters sent to the press until 1974. Despite his astrology-related penname the killer hadn't shown any clear interest in astrology, and it's possible he drew inspiration from previous killers such as Jack the Ripper. These letters included four cryptograms or ciphers, two of which have yet to be solved.
Works
Letters
- Zodiac Killer letter, November 29th 1966, titled "The Confession", authorship disputed
- Zodiac Killer letter, December 1966, titled "Sick of living/unwilling to die", poem carved on a desk, authorship disputed
- Zodiac Killer letter, April 30th 1967
- Zodiac Killer letter, July 31st 1969, sent to the San Francisco Chronicle, San Francisco Examiner and Vallejo Times
- Zodiac Killer letter, August 4th 1969, sent to the San Francisco Examiner
- Zodiac Killer letter, September 27th 1969, written on a car door at the Lake Berryessa crime scene
- Zodiac Killer letter, October 13th 1969, sent to the San Francisco Chronicle following the killing of cabdriver Paul Stine
- Zodiac Killer letter, November 8th 1969, the "Dripping Pen" card
- Zodiac Killer letter, November 9th 1969, the "Death machine" or "Bus bomb" letter, sent to the San Francisco Chronicle
- Zodiac Killer letter, December 20th 1969, sent to celebrity attorney Melvin Belli
- Zodiac Killer letter, April 20th 1970, sent to the San Francisco Chronicle
- Zodiac Killer letter, April 28th 1970, greeting card sent to the San Francisco Chronicle
- Zodiac Killer letter, June 26th 1970, sent to the San Francisco Chronicle
- Zodiac Killer letter, July 24th 1970, sent to the San Francisco Chronicle
- Zodiac Killer letter, July 26th 1970, sent to the San Francisco Chronicle
- Zodiac Killer letter, October 5th 1970, sent to the San Francisco Chronicle
- Zodiac Killer letter, October 27th 1970, sent to Paul Avery of the San Francisco Chronicle
- Zodiac Killer letter, March 13th 1971, sent to the Los Angeles Times
- Zodiac Killer letter, March 22th 1971, the "Lake Tahoe" card
- Zodiac Killer letter, January 29th 1974, the "Exorcist" letter, sent to the San Francisco Chronicle
- Zodiac Killer letter, Feb 14th 1974, the "SLA" card, sent to the San Francisco Chronicle
- Zodiac Killer letter, May 8th 1974, the "Badlands" card, sent to the San Francisco Chronicle
- Zodiac Killer letter, July 8th 1974, the "Count Marco Red Phantom" letter, sent to the San Francisco Chronicle
- Zodiac Killer letter, April 24 1978, sent to the San Francisco Chronicle, considered a forgery by most experts
- Zodiac Killer letter, May 4 1978, sent to Channel Nine, authorship disputed
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