This Is The Zodiac Speaking uncovers new and compelling evidence from the family he knew that Arthur Leigh Allen was indeed the mysterious murderer.

Perhaps the biggest revelation in the Netflix documentary This is the Zodiac Speaking comes via the Seawater siblings sharing that Leigh Allen confessed to being the Zodiac killer to them. David and Connie Seawater also claim Leigh Allen drugged them as children and may have even brought them along to the killings.

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

The Zodiac Killer was never caught, and his identity remains a mystery to this day. Arthur Leigh Allen was the only suspect identified by police, and though others have popped up during the year – including a man who even confessed – he has remained at the center of the case since the investigation started.

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

Arthur Leigh Allen has been one of the only viable suspects in the Zodiac case for decades The Zodiac Killer case remains unsolved, and three former students of a lead suspect are still looking for closure.

Netflix has released a new true crime documentary series called This is the Zodiac Speaking, and it's got people talking about the legendary case all over again

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.