The Zodiac Killer

The Zodiac Killer was a serial killer who operated in northern California in the late 1960s and early 1970s. The killer's identity remains unknown. The Zodiac murdered four men and three women victims between December 1968 and October 1969. The killer originated the name "Zodiac" in a series of taunting letters sent to the local Bay Area press. These letters included four cryptograms (or ciphers). Of the four cryptograms sent, only one has been definitively solved. Suspects have been named by law enforcement and amateur investigators, but no conclusive evidence has surfaced. The case was closed but In 2007 the case was reopened for the investigation.