Escape from Alcatraz: US Marshals hunt criminals who dug their way out of prison in 1962, US News

Some historians believe the three men died while trying to cross San Francisco Bay after their escape but some evidence suggests they made it out alive.

BOP: Alcatraz

The Daring 1962 Alcatraz Escape And The Inmates Behind It

Escape from Alcatraz: Letter claims three inmates survived 1962 prison break - The Washington Post

Alcatraz inmates survived infamous 1962 escape, letter suggests

BOP: Alcatraz

Alcatraz Escape - Unsolved Mysteries

US Marshals still searching for Alcatraz inmates who may have survived escape 60 years ago

June 1962 Alcatraz escape attempt - Wikipedia

Have you seen these fugitives? Alcatraz escape mystery remains after 60 years