Steven Andrew Matts, 57, was last seen in Yreka, California, on September 20, 2011, at Yreka High School. The next day he called his employer; that call was his last known contact with anyone. His credit card was later used in Halsey, Oregon, and his movements suggest he was traveling north on Interstate 5.

Matts was driving a gold 2001 Chevrolet S-10 pickup truck; the vehicle was recovered but no other traces of him have been found. He is described as 5 feet 9 inches, 230 pounds, with brown hair and brown eyes. Investigators with the Yreka Police Department continue to seek information, but no significant clues have emerged.

If anyone saw Steven, his truck, or has information about his route along I-5 around September 20–21, 2011, contact the Yreka Police Department.