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.

Arthur Leigh Allen has been the only publicly identified suspect by the police, however there was never enough evidence to charge him. Therefore, it cannot be confirmed whether or not Arthur Leigh Allen was the Zodiac Killer. In the documentary, the Seawater siblings claimed that Allen confessed to being the Zodiac killer.

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

There were some big revelations in Netflix's This Is The Zodiac Speaking, and the evidence appears to point one way.

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

Part of what made the Zodiac Killer such a notorious name was that he craved attention and took pleasure in taunting law enforcement. For years, the killer sent notes with messages to reporters in code or ciphers promising more violence.

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 Zodiac Killer’s enigmatic message was finally decoded nearly 50 years after the murder spree that shocked California, USA.