Police have linked the unidentified serial killer to five victims, though they believe the number could be as high as 16.

More than five decades after a series of murders terrorized Northern California, the Zodiac Killer has never been officially ...

The Zodiac Killer's cryptic messages weren't just taunts to police — they were a twisted throwback to his first victim, according to an independent investigator who says he's cracked the code and ...

The Zodiac Killer remains unidentified to this day. There have been several theories and alleged suspects, but almost six ...