MacKenzie was last seen on July 2, 1985 in Kissimmee, FL. He had close ties with his family and large sums of money in bank accounts at home. His family has never heard from him and his money has gone untouched. Convicted murderer Larry David Mooney, confessed to killing Carla King and MacKenzie in Osceola County. King's body was later found by a Florida Highway Patrol Trooper about 15 miles south of the Kissimmee-St. Cloud exit on Florida's Turnpike. MacKenzie's body was never found, and he is still listed as a missing person although Mooney confessed to his murder. Reports indicate Mooney was traveling with the two when he and MacKenzie got into a dispute over a Harley-Davidson motorcycle. Mooney told investigators that he shot Mackenzie and King and that MacKenzie was his roommate and a member of Hell's Angels. He was never charged for the murders.