Netflix's This Is the Zodiac Speaking sheds new light on one of America's most infamous unsolved serial murder casesthe Zodiac Killer. Over the years, the case has remained a haunting mystery, with police publicly naming only one suspect: Arthur Leigh Allen, a former elementary school teacher and convicted sex offender. However, despite strong suspicions, there was never enough evidence to charge Allen. The documentary dives deep into Allen's life, introducing footage and interviews with key figures, including Allens former students, friends of the victims, and investigative reporters who extensively covered the Zodiac Killer case.

At the heart of the documentary lies the previously unheard testimony of the Seawater family, who knew Allen personally. The family reveals startling details about their childhood interactions with Allen, recounting how he took them to places later identified as Zodiac crime scenes. These revelations, combined with cryptic comments and symbols Allen left behind, raise...