The Trailside Killer emptied State and National Park trails in the Northern California area in the late 1970s and early 1980s as it was no longer a safe place to be. Male or female, alone or in a group. With a dog or without one. It seemed that no one was safe even in broad daylight. With the help of a spot on profile by founding FBI profiler John Douglas and the gut instinct of a young woman that unfortunately did fall victim to this man, David Carpenter's killing spree was brought to an end and he currently sits as the oldest living inmate on death row in San Quentin.