The Zodiac Killer is an unidentified serial killer who operated in the San Francisco Bay Area during the late 1960s and early 1970s. The killer's identity remains unknown, adding to the mystery and intrigue surrounding the case. The Zodiac Killer taunted law enforcement and the media with cryptic letters and ciphers, claiming responsibility for a series of murders. The crimes typically involved young couples in secluded areas, and the killer seemed to derive pleasure from the fear and attention generated by the crimes. Despite an extensive investigation, the Zodiac Killer was never caught, making the case one of the most infamous unsolved mysteries in criminal history.