Arthur Leigh Allen was a convicted child molester and a prime suspect in the unsolved Zodiac Killer case that terrorized Northern California in the late 1960s and early 1970s. He was born on December 18, 1933, and died on August 7, 1992. Allen's name came up in connection with the Zodiac due to various circumstantial evidence, including his interest in cryptography and the timing of his activities. Despite extensive investigations, no definitive proof linked Allen to the Zodiac killings. His life and potential involvement have been the subject of various books and documentaries, contributing to ongoing public fascination with the Zodiac Killer mystery.