Harry Leo Walker Jr., known as Mickey, vanished from Clinton, Maryland, in July 1986. He was 36, over six feet tall with black hair beginning to gray, a husband and father of three. The last known communication was a note he left for his wife and children; the contents have not been made public. Reports say he was distraught for unspecified reasons on the day he disappeared.

There have been no confirmed sightings, no contact, and no public leads since that summer. The Prince George’s County Police Department handled the investigation, which has gone cold and remains unresolved. Very few details are available publicly about the circumstances surrounding his disappearance.