On the morning of June 12, 1962, three men were missing from Alcatraz. What happened after they left the island remains the question at the center of one of its best-known stories.
What the record establishes
Frank Morris and brothers John and Clarence Anglin escaped on June 11, 1962. Investigators reconstructed evidence of their departure and searched for the men. The FBI’s historical case account does not establish that they survived the bay crossing.
It also records the end of the FBI investigation in 1979 and the transfer of responsibility to the U.S. Marshals Service. That account is useful for understanding what investigators concluded, and what they could not resolve.
Where certainty stops
An unanswered question is not evidence for one preferred ending. A missing person, a reported sighting, a film scene, and a documented finding are different kinds of information. They should not be treated as interchangeable.
Keep two questions separate when you read: did the men leave the prison, and what happened afterward? The first has a historical answer. The second is where the enduring uncertainty lies.
Reading the legend carefully
Popular accounts often resolve ambiguity because a complete ending makes a satisfying story. Historical reading asks for something more demanding: a clear distinction between evidence, inference, and imagination.
Start with the primary case summary below. Then return to the broader prison history. An exceptional event can be fascinating without becoming the only way we understand decades of life on the island.