Arthur Leigh Allen was the prime suspect in the Zodiac killer case. With a new documentary about the murders now streaming on Netflix, here’s what we know about Allen, including how and when he died. The identity of the Zodiac killer remains one of the greatest mysteries in American criminal history.

Throughout the 1960s, Zodiac murdered couples as well as lone men and women in California, and mostly around the San Francisco Bay Area. He also wrote letters to local news, taunting law enforcement and journalists covering the case. But the killer was never found.

New Netflix documentary ‘This is the Zodiac Speaking’ aims to shed some light on the case, and via the Seawater family who knew him, points a finger directly at Arthur Leigh Allen. Arthur Leigh Allen was the prime Zodiac killer suspect Arthur Leigh Allen was a school teacher during the time of the Zodiac murders, and became the number one suspect as far as the police were concerned. That’s because there was much circumstantial evidence connecting him to the case.

He owned and wore a Zodiac Watch that might have inspired his own nickname. Drove a car that matched the killer’s. Owned a typewriter in line with the letters that were written.

While he also had the same shoe size. Michael Mageau, who survived a Zodiac attack, picked him out in a lineup years later. While Bryan Hartnell, another survivor, believed he recognized his voice and stature.

Friend Don Cheney also said Leigh claimed he would kill couples, a.