Glenn Dukart, 20, was last seen at Lake Pleasant, Arizona, on April 12, 1981. He was on the lake’s north shore in Yavapai County and last wore a t-shirt and blue jeans. At an estimated six feet, six inches with blond hair and hazel eyes, he vanished that day and was not reported missing until April 17, 1981.

The case file contains few specifics about that day — no clear account of companions, plans, or whether personal items or a vehicle were left behind. Investigators later submitted DNA from Glenn’s mother, father, and sister to national databases to help identify him if remains were ever recovered.

The disappearance remains unsolved. Did anyone who spent time at Lake Pleasant in April 1981 see Glenn or recall anything about that day?