One night in December of 1986, Cara Knott disappeared while driving home. She and her car were found the next day off the side of a highway. That same day, a local police officer known for pulling over women late at night was seen with scratches on his face. But did he actually kill Cara Knott? We talk with Jim Trainum, retired MPD homicide detective and investigative consultant.See omnystudio.com/listener for privacy information.