Gayle Marie Marks was 18 when she vanished from Stockton, California, on October 18, 1988. She was last seen after a trip to the Department of Motor Vehicles to get an identification card; the card was later mailed to her home, confirming she completed that errand. After leaving the DMV she called her mother and left a voicemail that showed no sign of distress.

Gayle was scheduled to meet a friend and then work a shift at Rick’s New York Style Pizza, but she never arrived at either place. She left behind personal belongings and never collected her final paycheck, facts that heightened concerns about foul play. Her disappearance has been linked to Wesley Shermantine and Loren Herzog, the pair known as the Speed Freak Killers; Shermantine has provided locations for some victims, but Gayle’s body has not been found.

The case remains open and unsolved. Does anyone have information about Gayle’s movements in Stockton on October 18, 1988, or contacts who might help investigators?