Fredrick Manuel Aragon, a 28-year-old Hispanic man, was last seen on July 18, 1987, at his Vacaville, California, residence. He was 6 feet 3 inches and about 185 pounds, with black hair, brown eyes, and wore glasses. He had a diagnosed behavior disorder, may have had a mustache, and had two missing front teeth replaced with false teeth. He was last seen wearing a red-checkered long-sleeve shirt and blue jeans.

Aragon was driving a red 1973 Datsun pickup when he disappeared. That truck was found abandoned on February 2, 1988, on Lombard Street near the entrance to the Presidio Army Base in San Francisco, but investigators reported the discovery offered no clues to his whereabouts. The Vacaville Police Department lists the case as an unsolved endangered missing person investigation, case number 87-04703, and the family continues to seek answers.

If anyone knew Fredrick, his habits, or saw that red 1973 Datsun in July 1987 through February 1988, please share what you remember.