Alcatraz Federal Penitentiary in January 1934. The hospital facilities were checked by three officials from the Marine Hospital of San Francisco. The Bureau of Prisons personnel arrived on Alcatraz in early February; among them was Loring O. Mills, acting chief clerk. In April 1934, the old material was removed from the prison, holes were cut in the concrete and 269 cell fronts were installed, built using four carloads of steel ordered from the Stewart Iron Works. A legend at the works is that a shipment of cells and iron accidentally fell into San Francisco Bay during transportation from San Francisco Dock to Alcatraz
June 1962 Alcatraz escape attempt to death by guards because he wouldn't help investigators locate his brothers. A 2014 study of the ocean currents by scientists at Delft University and the research institute Deltares indicates that if the prisoners left Alcatraz at 11:30 pm on June 11, they could have made it to Horseshoe Bay just north of the Golden Gate Bridge, and that any debris that were released into the bay would have floated into the direction of Angel Island, consistent with where the paddle and belongings of the prisoners' was actually found. A 2015 History Channel documentary presented further circumstantial evidence gathered over