The Zodiac Killer is an unidentified serial killer who is believed to have murdered at least five people in Northern California between 1968 and 1969, with some claims of up to 37 victims. The killer targeted young couples and a lone taxi driver, using shootings and brutal stabbings. He became infamous for sending taunting letters and ciphers to local newspapers and police, including details only the killer and law enforcement would know, and signing his messages with a distinctive cross-circle symbol resembling a zodiac sign

. Despite extensive investigations over decades, the Zodiac Killer's true identity remains unknown. The only officially named suspect was Arthur Leigh Allen, a former elementary school teacher and convicted sex offender, but no conclusive evidence has ever been found to definitively link him or anyone else to the crimes. The case remains open with multiple law enforcement agencies, and the mystery continues to attract amateur detectives and true crime enthusiasts

. In summary, the Zodiac Killer's identity has never been confirmed, and he remains one of America's most famous unsolved serial murder cases