this day in crime history: may 2, 1946

On this day in 1946, an aborted escape attempt led to what became known as the Battle of Alcatraz. The incident began when convicted bank robber Bernard Coy attacked guard William Miller as he frisked inmate Marvin Hubbard in the prison’s C Block. Coy and Hubbard were able to overpower Miller. They then released inmates Joseph Cretzer and Clarence Carnes from their cells.

Coy climbed up to the block’s elevated gun gallery, which was unattended at the moment. He had previously noted a flaw in the bars protecting the gallery which allowed him to use a makeshift tool to widen the bars. Once he had done that, he managed to squeeze through the bars and into the gun gallery. When guard Bert Bunch returned to the gun gallery, Coy overpowered him and relieved him of his keys, rifle and pistol. He also availed himself of other items in the gun gallery, including clubs and gas grenades.

Coy lowered the keys and weapons to his accomplices, keeping the rifle for himself. He then moved to D Block where he forced a guard, at gunpoint, to open the door to the cell block. About a dozen inmates left D Block, which was used as a disciplinary block. Most returned to their cells. Two of the inmates, Sam Shockley and Miran Thompson, joined the would-be escapees.

The inmates’ plan was to get out of the prison, make their way to the dock using hostages as human shields, then use the prison launch to get to the mainland. The next hurdle they faced in their plan was unlocking the door to the outside. After multiple unsuccessful attempts with the wrong keys, they finally found the right one. Unfortunately for them, the lock was damaged from having the wrong keys shoved in it. They were unable to open the door.

While the inmates were fighting their losing battle with the lock, several other guards wandered onto C Block, unaware that inmates had seized control of that part of the prison. They were taken hostage and put in cells. The number of hostages eventually reached nine guards, who occupied two cells.

Frustrated by the uncooperative lock, Cretzer opened fire on the hostage guards, wounding five. One, William Miller, later died from his wounds. Coy used the rifle to fire on guards in the prison towers. Thompson, Shockley, and Carnes elected to return to their cells. Coy, Hubbard, and Cretzer decided to stay and fight.

An assault by guards was met with gunfire. Officer Harold Stites was killed and four guards were wounded. Warden James Johnston called for help from the military. Two platoons of Marines were sent to help with the assault on C Block and to assist in guarding the other inmates.

That evening, a contingent of guards engaged in a rescue operation to free the hostages while armed guards exchanged gunfire with the three inmates. Once the hostages had been rescued, guards and Marines subjected C Block to a barrage of fire using, machine guns, grenades, and mortars.

Early the next afternoon, the inmates telephoned the warden in an attempt to negotiate a deal. There was no deal to be had, short of unconditional surrender, which was unacceptable to Coy and his accomplices.

The barrages continued through into night. The next morning, armed guards entered the cell house to find Coy, Hubbard, and Cretzer dead.

Inmates Thompson, Shockley, and Carnes were all convicted for their roles in the escape attempt and the death of two guards. Thompson and Shockley were sentenced to death. Carnes received a life sentence, but was released in 1973.