The Zodiac Killer operated in Northern California in the 1960s-1970s, targeting young couples. Some of the confirmed victims included teenagers Betty Lou Jensen and David Faraday, and Darlene Ferrin and Mike Mageau. He sent taunting cryptograms and letters to police and newspapers claiming he enjoyed killing people. Though several suspects were investigated over the years, including Richard Gaikowski and Arthur Leigh Allen, the Zodiac Killer was never identified and remains uncaught.