The most famous prisoner was Al Capone.  He escaped from it in 1930.
assitant
There were some pretty interesting people.  A man named Al Capone, for example, was sent there.  He was found guilty of violating the Volstead Act, which prohibited alcohol.
assistant
What is Alcatraz famous for?
user
It was a prison where criminals who could not be easily controlled were sent.  It was closed in 1963.
assistant
Was there anyone notable there?
user