I was looking forward to this series but it turns out to be another Robert Graysmith propaganda film. The entire series is based on the interviews of the Seawater family, who were family friends of one of the Zodiac suspects, Arthur Leigh Allen.
We are expected to believe them even though they never brought forth this story to the authorities. There is no way to confirm anything they're saying. Their testimony would be useless in a court of law.
What the series leaves out is ANY speculation the Zodiac could be anyone other than Arthur Leigh Allen. What they also leave out is the considerable amount of physical evidence that Allen was NOT the Zodiac.
Allen gave two handwriting samples with both hands, since he was ambidextrous. They were studied by a number of handwriting experts. Both samples came up NOT a match. The ballistic tests of all of Allen's guns came back negative to the bullets found in the murders. The bloody fingerprints that were on the taxicab of Paul Stine were NOT a match. The partial palm print that was lifted off one of the confirmed Zodiac letters was NOT a match. Finally, the partial DNA sample off one the stamps on one of the confirmed Zodiac letters ruled out Arthur Leigh Allen. In short. While there may be a lot of circumstantial evidence pointing to Allen as the Zodiac. There is substantial amount of physical evidence he was NOT.
This docuseries was not good investigative journalism. It worked backward from the producer's chosen suspect and left out anything that contradicted its main theory.
The Zodiac case remains unsolved and this docuseries did nothing to bring it closer to a solution.