Zodiac killer is the alias of a nameless Serial killer who operated in Northern California from the late 1960s to the early 1970s. The Zodiac murdered innocents in Benicia, Vallejo, Napa County, and San Francisco between December 1968 and October 1969. The zodiac targeted four men and three women between the ages of 16 to 29, two of the men survived the attempted Murder. The killer himself claimed to have killed up to '37' innocent victims. He was called The 'Zodiac' because of the series of taunting letters and cards sent to the local Bay areas press. The letters included four ciphers. From the four ciphers, one has been definitively solved.
The Zodiac killer has never been caught. There were many attempted copycats in different countries. But the original Killer was never out of the US. The SFPD mark the case closed in April 2004, but 'reopened' the case for a short while in March 2007 because of a possible lead on the killer, but it was a false lead as were the many others. The case still remains open in Napa County and Solano County. The California Department of Justice still has the case open since 1960. He still hasn't been caught the man without any motive who just murdered people for fun, he even informed the police departments before targeting a person the way he was gonna kill them and the location, just so he can taunt them after that they still haven't caught him.