According to Wikipedia: The June 1962 Alcatraz escape attempt was one of two escape attempts from Alcatraz Federal Penitentiary in which neither the escapees, nor their bodies, were found. Late on the night of June 11 or early morning of June 12, inmates Clarence Anglin, John Anglin, and Frank Morris tucked heads made out of soap wax resembling their own likenesses into their beds, broke out of the main prison building via an unused utility corridor, and departed Alcatraz Island aboard an improvised inflatable raft to an uncertain fate.