Jeffrey Richard Chisholm was 19 when he was last seen by friends at a music studio in Pomona, California, on August 19, 1994. He had registered for classes at Fullerton College just weeks earlier and was described by family as a normal teenager and a good student. At the time he vanished he was wearing a white t‑shirt, blue jeans, and Nike sneakers.

Six weeks after his disappearance Chisholm’s white 1990 Ford Ranger pickup was found locked and immobilized on a remote dirt road about 35 miles south of Colorado City, Arizona — hundreds of miles from his West Covina home. The truck’s alarm and a kill switch had been activated, but there was no sign of Jeffrey and his bank accounts show no activity since. A 1998 tip placed him in St. George, Utah, but that lead did not produce him. He is white, dark blond hair, blue eyes, with a scar below his left eyebrow.

Does anyone who knew Jeffrey or saw his truck in Arizona or Utah have information that could help explain where he went?