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30-year-old male suspect

Thousands of men have been named as a possible suspect for the Zodiac Killer, an unidentified serial killer active between December 1968 and October 1969. The Zodiac murdered five known victims in the San Francisco Bay Area, operating in rural, urban, and suburban settings. He targeted three young couples and a lone male cab driver. The case has been described as "arguably the most famous unsolved murder case in American history", and has become both a fixture of popular culture and a focus for efforts by amateur detectives.