The Zodiac Killer, more formerly known as “The Zodiac” was an unidentified American serial killer who is believed to have murdered at least five people in northern California between 1968 and 1969. He taunted police and made threats through letters sent to area newspapers from 1969 to 1974, before abruptly ceasing communication. Despite intensive investigations, no one was ever arrested for the crimes and the case remains open. The mystery surrounding the murders has been the subject of numerous books and movies, including director David Fincher's acclaimed 2007 feature Zodiac.To this day he has never been found, although throughout the years many people have tried to solve the ciphers that he left behind and sent to police.