A new documentary digs deep into the unsolved serial killer, known to taunt the press and police, with obscure letters.

People who knew Arthur Leigh Allen as children say he confessed, drugged them, and brought them to the sites of Zodiac killer murders

Netflix's Zodiac Killer docuseries contains first hand accounts that support the claims from David Fincher's classic true crime film.

The Zodiac Killer was connected to several murders in Northern California during the 1960s, earning his cryptic name by sending taunting letters to local newspapers that threatened killing sprees if they weren't published.

Netflix documentary This is The Zodiac Speaking takes another look at the horrific murders of The Zodiac Killer. We look at the prime suspect in the case, Arthur Leigh Allen, and what happened to him in the aftermath of the killings.

Netflix’s This is the Zodiac Speaking focuses on Arthur Leigh Allen, but eight other men have been accused of being the killer.

The Zodiac was never caught — and there are countless theories regarding his true identity. However, the late Arthur Leigh Allen, a Navy vet turned school teacher, has remained

The key to the three-part docuseries is interviews with the Seawater siblings, who knew Allen years before the Zodiac's murders in Northern California.