Cara Evelyn Knott was a 20-year-old college student from San Diego who was murdered on December 27, 1986, while driving home on Interstate 15. Her abandoned car was found near the Mercy Road offramp, and her body was discovered the next day at the bottom of a 65-foot ravine by the Los Peñasquitos Creek Arch Bridge.

Investigators determined a uniformed California Highway Patrol officer, 36-year-old Craig Alan Peyer, had pulled her over on that isolated offramp. Multiple women later reported similar stops in which Peyer made them uncomfortable. Physical evidence connected Peyer to the killing: a rope from his patrol car matched the ligature marks, a rare gold rayon fiber from his uniform matched fibers on her dress, blood on her boot was consistent with his AB negative type, and witness statements and tire marks placed him at the scene. Peyer also had facial scratches soon after the murder.

In 1988 Peyer was arrested, tried, and convicted; he received a 25 years to life sentence. Did anyone who knew Cara or who drove that offramp in 1986 see anything that night or remember similar encounters with a CHP officer?