John Allen Troha was 18 when he was last seen in Royal Oak, Michigan, on October 14, 1981. He left on foot saying he was going to a nearby store and never returned. At the time he disappeared he was described as white, 5 feet 7 inches to 5 feet 9 inches tall, 160 to 170 pounds, with shoulder-length wavy brown hair and hazel eyes.

When last seen he wore a brown flannel shirt, a light blue sweatshirt, a reversible blue-and-orange vest, and dark brown corduroy pants. Case records note he had a dental bridge replacing two teeth; his profile was entered into national missing-person resources and the Royal Oak Police Department lists the investigation under case number 81-29928.

His disappearance is classified as an endangered missing case and investigators have said foul play is possible, but no suspect or confirmed resolution has been announced.

If anyone saw John in Royal Oak around October 14, 1981, or has information about his movements that day, please share what is known.