Arthur R. "Doc" Barker the son of Ma Barker and a member of the Barker-Karpis gang along with Alvin Karpis. In 1935, Barker was sent to Alcatraz Island on conspiracy to kidnap charges. On the night of January 13, 1939, Barker with Henri Young and Rufus McCain attempted escape from Alcatraz. Barker was shot and killed by the guards.
