The Zodiac Killer was a serial killer who operated in Northern California. The first murders were on December 20, 1968. He coined his name in a series of taunting letters he sent to the press until 1974. His letters included four cryptograms, three of which have yet to be solved.
The Zodiac murdered five known victims in Benicia, Vallejo, Lake Berryessa (near Napa), and San Francisco between December 1968 and October 1969. Four men and three women between the ages of 16 and 29 were targeted, and no connections between them have ever been discovered; they appear to have been victims of opportunity, nothing more. In his letters Zodiac claimed 37 kills.
While it is often claimed that the Zodiac knew his victims, there has never been any credible evidence to suggest this was true. Numerous others have been thought to be Zodiac victims, although the evidence is scant at best. The killer's identity remains unknown. The San Francisco Police Department marked its investigation "inactive" in April 2004 but reopened the case in 2007. The case remains open in other jurisdictions.
The link with the letters he wrote is posted on the related links box below.
List of definite victims and some that are possible victims:
David Faraday and Betty Lou Jensen
Darlene Ferrin and Mike Mageau
Cecelia Shepard and Bryan Hartnell
Robert Domingos and Linda Edwards
Cheri Jo Bates