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Investigating crime news – Zodiac killer, American serial killer

Zodiac killer, unidentified American serial killer who is believed to have murdered at least five people in northern California between 1968 and 1969. An earlie murder, the stabbing death of an 18-year-old college student in Riverside California in 1966, is also sometimes attributed to the Zodiac killer. The case inspired the influential 1971 action film Dirty Harry which starred clint Eastwood, and it was the subject of the critically acclaimed David Fincher dramatic film Zodiac (2007).

In 1968 a teenage couple was shot to death near their car in a remote area north of San Francisco; one year later another couple was attacked in similar circumstances, though the male victim survived. After the 1969 attack, the killer phoned police to alert them to the crime and to take responsibility for the 1968 murders. Later that year the Zodiac killer attacked another young couple, though once again the male survived. The last known victim, a taxi , driver was shot in October 1969.

The murders were the subject of intense investigation and media coverage, particularly because of the killer’s taunting letters to newspapers and phone calls to police. His letters, sent from 1969 to 1974, were signed with a symbol resembling the crosshairs of a gunsight and typically began with the phrase, “this is the Zodiac speaking.” Included among the letters were four ciphers or cryptograms, the first of which was sent in three parts to three Bay Area newspapers in July 1969. Known as the “408 cipher” for the number of characters it contained, it was soon decoded  by a pair of private citizens. Its message stated in part that, “I like killing people because it is so much fun.” Another  cipher , the “340 cipher,” mailed to the San Francisco Chronicle in November 1969, was finally decoded in 2020 by a team of three amateur code breakers; its message began, “I hope you are having lots of fun in trying to catch me.”

Much remains mysterious about the Zodiac case, not least the issue of when the crimes stopped. Crime writer Robert Graysmith argued that the Zodiac killer remained active through the 1980s and murdered dozens more people, though this view is controversial. During the 1990s several investigators claimed to have identified the Zodiac killer; the suspect most often cited was Arthur Leigh Allen (1933–92), a  Vallejo, California, schoolteacher who had been institutionalized in 1975 for child molestation, though his identification with the Zodiac killer has never been substantiated.

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