On the evening of April 9, 1987, 22-year-old Marilyn Joi Base left her Tulsa apartment to use the complex laundry room and never returned. Her boyfriend found her car still parked by the laundry with keys in the ignition, an untouched laundry basket in the front seat, and her clothes reportedly still in the machines — suggesting she never made it inside the building.

Ten days later, on April 19, authorities, acting on an anonymous tip, found Marilyn’s body in a ravine off Highway 10 on Braggs Mountain in Muskogee County, about 55 feet from the road. She was naked, badly decomposed, and the medical examiner determined the cause of death to be strangulation by a ligature; some reports also indicated sexual assault. Investigators received a tip from an unidentified woman who said she had seen Marilyn abducted and left a sketch in a phone booth, but police called the sketch unhelpful. No arrests were ever announced and the case remains unsolved.

Did anyone in the area know Marilyn, her routines, or notice anyone or a vehicle near the laundry room on April 9, 1987?