Isaac Eugene Gibson, 63, was last seen August 1, 1987, in Abilene, Texas, after visiting his sister-in-law’s home as he regularly did on the first of the month. He left her residence and never returned; he often used taxis for transportation but few details about his movements that day are known.

Isaac is described as a Caucasian male between 5 feet 11 inches and 6 feet 3 inches, with gray hair and blue eyes. He had scars on one foot and was missing several toes, likely from a military injury. He was known by the nicknames Izzy and Billy and typically wore jeans and long-sleeved shirts.

Despite investigations, no substantial leads have emerged and the disappearance remains unsolved. If anyone has information about Isaac’s whereabouts on or after August 1, 1987, contact the Abilene Police Department.