Along with Alvin Karpis, Arthur Barker was sent to Alcatraz Federal Penitentiary to serve his life term.
 On January 13, 1939, Barker and fellow inmates Dale Stamphill, Henri Young, William "Ty" Martin and Rufus McCain attempted to escape.
Henri Young later said of Barker, "he was one of America's most dangerous men.
I knew, however, that he was determined and ruthless, and that once he started on anything nothing could stop him but death.
I couldn't think of anyone else I'd rather have with me on a break from Alcatraz."

The four men had been placed in the segregation unit for troublesome prisoners.
Barker and his associates sawed through four sets of prison bars, concealing the daily damage with makeshift putty.
When they finally broke through, they climbed over the high walls of the prison under cover of a foggy night and made their way to the beach.
The four then split up into two pairs.
Barker and Stamphill tried to swim out together towards San Francisco, but were pushed back by the tide.
They then tried to quickly build a raft from bits of wood lying around the beach, tying them together with strips of cloth from their shirts.
They hoped to make a serviceable raft before they were spotted, but were seen from a guard's tower when the fog briefly cleared.
The guard ordered them to "throw your hands in the air", but they ignored him.
Stamphill later said they didn't hear any warnings.
The guard opened fire, hitting them in the legs.
Another burst of fire from a patrol boat wounded Barker in the head.
He told Stamphill, "Don't move.
They are going to kill us".
Barker was recaptured, dying shortly afterwards from his wounds.
Stamphill, Young and McCain were also recaptured and sent to solitary confinement.
Stamphill later claimed the associate warden gave instructions that if Doc moved at all the guards were to shoot him in the head.
Doc was in considerable pain and reached for his wounded leg and was then shot.
Once in the infirmary, the doctors attempted to give him a blood transfusion.
He yanked the tubes out of his arm.

Arthur Barker is buried in Olivet Memorial Park, Colma, California.
Along with Alvin Karpis, Arthur Barker was sent to Alcatraz Federal Penitentiary to serve his life term.  On January 13, 1939, Barker and fellow inmates Dale Stamphill, Henri Young, William "Ty" Martin and Rufus McCain attempted to escape. Henri Young later said of Barker, "he was one of America's most dangerous men. I knew, however, that he was determined and ruthless, and that once he started on anything nothing could stop him but death. I couldn't think of anyone else I'd rather have with me on a break from Alcatraz."
The four men had been placed in the segregation unit for troublesome prisoners. Barker and his associates sawed through four sets of prison bars, concealing the daily damage with makeshift putty. When they finally broke through, they climbed over the high walls of the prison under cover of a foggy night and made their way to the beach. The four then split up into two pairs. Barker and Stamphill tried to swim out together towards San Francisco, but were pushed back by the tide. They then tried to quickly build a raft from bits of wood lying around the beach, tying them together with strips of cloth from their shirts. They hoped to make a serviceable raft before they were spotted, but were seen from a guard's tower when the fog briefly cleared. The guard ordered them to "throw your hands in the air", but they ignored him. Stamphill later said they didn't hear any warnings. The guard opened fire, hitting them in the legs. Another burst of fire from a patrol boat wounded Barker in the head. He told Stamphill, "Don't move. They are going to kill us". Barker was recaptured, dying shortly afterwards from his wounds. Stamphill, Young and McCain were also recaptured and sent to solitary confinement. Stamphill later claimed the associate warden gave instructions that if Doc moved at all the guards were to shoot him in the head. Doc was in considerable pain and reached for his wounded leg and was then shot. Once in the infirmary, the doctors attempted to give him a blood transfusion. He yanked the tubes out of his arm.
Arthur Barker is buried in Olivet Memorial Park, Colma, California.
Arthur Barker