Have you seen this man?

Wikipedia entry on one of the men who inspired the Alcatraz Sharkfest Swim:

John William Anglin (May 2, 1930 - presumed dead June 11, 1962) was an American criminal who escaped from Alcatraz along with his brother Clarence and Frank Morris on June 11, 1962 and then was never heard from again.

In the 1979 Escape from Alcatraz movie John Anglin was played by Fred Ward. Anglin was born in Donalsonville, Georgia. His FBI wanted poster states his occupation as a farmer and a laborer. He and his brother were arrested for grand larceny and bank robbery.

John and Clarence Anglin -- who were considered loud-mouthed and hot-headed -- were both excellent escape artists, and they managed to weave their way out of most prisons. They ended up at Alcatraz after Clarence was found in a bread-bin at Leavenworth.

John Anglin was the second to know about the plan; for about two years he chiseled the ventilator grill at the back of his cell. The Anglins and Morris escaped the island on the night of June 11, 1962.