Prison officials have long claimed that no inmate has ever successfully escaped Alcatraz, and that the three men who tried died during the attempt.
Back in 1962, John and Clarence Anglin, along with fellow inmate Frank Morris, dug out of their cells using spoons. Watch video on how they dug out here.
The men left paper-mache heads of themselves, including their own hair, in their beds to cover up their escape.
They then fled the prison via the roof and onto a raft made from raincoats. The men were never seen again and the raft was discovered on the San Francisco coast the following day.
Authorities have always insisted that the men drowned while trying to reach San Francisco.
But nephews of the Anglin brothers now claim to have proof that their relatives survived the paddle to shore and could still be alive today.
Their “proof” includes Christmas cards the family received back in December 1963 and a photo they claim shows the brothers alive well into the 1970s.
A forensic expert says it’s “highly likely” that it is the Anglin brothers in the picture below.
(Image: Anglin Family Archive/History)
A handwriting expert has verified the writing on the Christmas card matches the brothers’ handwriting, but there is no way to confirm whether it was written before or after the escape.
If they were alive today, the brothers would be 84 and 85 years old. There’s been no evidence presented on what happened to fellow escapee Frank Morris.
Watch more on how they built the prison here.