Clarence Anglin, 31, disappeared after the night of June 11, 1962, when he and two other inmates — his brother John Anglin and Frank Morris — escaped from Alcatraz Federal Penitentiary. The three had prepared a raft from raincoats and made dummy heads to give the impression they were asleep; they crawled through a utility corridor, climbed to the roof and launched their makeshift raft into San Francisco Bay.

No definitive trace of Clarence has ever been found. Authorities recovered a paddle, some personal effects and fragments of the raft, but no bodies. The FBI’s early conclusion was that the men probably drowned in the cold, treacherous waters, yet the absence of physical confirmation left room for alternate theories. The U.S. Marshals Service has kept active warrants for the escapees, and various leads over the years — including a photograph and letters alleging the Anglin brothers were living in South America — have been reported, though Clarence’s official status remains missing and presumed drowned.

If anyone knew Clarence before his imprisonment or has information about sightings or family contacts after 1962, please share what is known.