Zodiac Killer case never solved: no trial, suspect Allen died without charges

The Zodiac Killer case began in December 1968 with the murders of two teenagers in Benicia, California, though the killer’s first confirmed attack occurred on July 4, 1969, in Vallejo. That night, a young couple was shot while parked at a remote lover’s lane; the male victim died, and the female survived. On September 27, 1969, the killer struck again at Lake Berryessa, stabbing a couple; the male died, the female survived. On October 11, 1969, a taxi driver was shot and killed in San Francisco’s Presidio Heights.

The killer coined the name “Zodiac” in a series of taunting letters to newspapers, beginning in August 1969, in which he claimed responsibility and included cryptograms. The case was never solved, and no trial ever occurred.

The perpetrator was never identified. The victims widely reported by name include David Faraday and Betty Lou Jensen (December 1968), Michael Mageau and Darlene Ferrin (July 1969), Bryan Hartnell and Cecelia Shepard (September 1969), and Paul Stine (October 1969). Ferrin and Stine died; Shepard died two days after the attack.

Key figures around the case include San Francisco police homicide inspectors, Vallejo police detectives, and reporters at the San Francisco Chronicle who received the Zodiac letters. The lead suspect often discussed in the media was Arthur Leigh Allen, a Vallejo schoolteacher and convicted child molester, but he was never charged and denied involvement. No other suspect was ever formally named by police.