Carla Mae Morgan Hickman was a 45-year-old real estate agent and mother of three in Tulsa, Oklahoma. On the morning of April 3, 1978, she drove to show a house at 1514 N Vandalia Place to a man she had arranged to pick up at a downtown bus station. The homeowner, Grace Moyer, left during the showing and returned after about an hour to find Hickman’s car still in the driveway; inside a bedroom Moyer found Hickman dead from multiple stab wounds to her abdomen. The murder weapon was not recovered and there were no obvious signs of a struggle at the scene.

Police circulated descriptions of a man seen getting into Hickman’s car in downtown Tulsa that morning — wearing a red baseball cap, a plaid shirt, and grey slacks — and a second person of interest described as a white male, 6 feet tall and 170 pounds, with short black hair and a mustache. Detectives later interviewed two men in Georgia but found no connection. Several other assaults on female real estate agents in the Tulsa area occurred around the same time, but any link to Hickman’s killing is unknown.

What can anyone who knew Carla or who remembers the bus station pick-up add to this investigation?