Tinsley was last seen at Lake Overholser in Oklahoma City, Oklahoma on April 13, 1986. She was there with friends when, at 2:00 p.m., she said she was going to take a ride around the lake on a motorcycle with a man she had just met. Tinsley left her purse and cigarettes behind with her friends. She never returned from the ride and has never been heard from again. His motorcycle was a blue 650 cc or 750 cc Kawasaki model, possibly with out of state license plates. He has never been identified. Tinsley's ears are pierced, and she has a mole on the left side of her mouth. She smokes cigarettes. Her nickname is Pam.