The Zodiac Killer (notorious criminal)

The Zodiac Killer was an unidentified serial murderer active in Northern California during the late 1960s and early 1970s. He targeted victims, often young couples, and gained notoriety for sending cryptic letters, ciphers, and taunting police and media. His confirmed victims numbered five, but he claimed responsibility for more murders. Despite extensive investigations and several prime suspects, the Zodiac Killer's identity remains unknown. His cryptic communications and elusive persona have made him one of the most infamous unsolved criminal mysteries in American history.