David Carpenter a.k.a. the Trailside Killer, is an American serial killer known for stalking and murdering women on hiking trails near San Francisco.
On August 20, 1979 Edda Kane disappeared while hiking in Mt. Tamalpais State Park, near San Francisco. She was found the following day, killed by a bullet to the back of the head. Eight months later, Barbara Schwartz, 23, was found stabbed to death in the same park. Then in October 1980, 26-year-old Anne Alderson went out for a jog in Mt. Tamalpais Park and never returned. She was found shot to death.
As the police intensified their search for the “Trailside Killer,” he appeared at Point Reyes Park on November 27, where he shot Shawna May, 25. May’s body was found two days later. As if that wasn’t enough, three more corpses were found nearby, the victims identified as Diane O’Connell, 22, Cynthia Moreland, 18, and Richard Towers, 19. All had been shot. The women, as with the previous victims, had been raped.
With a media frenzy now underway and a massive police operation in place, the killer struck again on March 29, 1981, this time in Henry Cowle State Park, near Santa Cruz. Ellen Hanson was shot to death. Her boyfriend, Stephen Haertle, was severely injured but escaped and was able to provide police with a description of the attacker and his car.
That description got investigators no closer to catching the Trailside Killer. Indeed, it was an apparently unrelated crime, the murder of 20-year-old Heather Scaggs that would crack the case.