The provided text discusses the unsolved case of the Zodiac Killer, a serial killer who terrorized Northern California in the late 1960s. It highlights the upcoming release of a Netflix docuseries, "This Is the Zodiac Speaking," which examines the case and presents new evidence, including interviews with individuals who knew the primary suspect, Arthur Leigh Allen. The text also provides a brief history of the Zodiac case, detailing the murders, the killer's taunting letters, and the ongoing efforts to identify him. The text concludes by acknowledging the lasting cultural impact of the Zodiac, noting its influence on popular culture, true crime enthusiasts, and even other criminal cases.

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