First off, there is more than one kind of stem cell. Human stem cells are unique because they have the potential to become a specialized cell and can divide and renew themselves, according to the National Institutes of Health.
Doing Time as a Federal Prison: 1934-63. In 1933, the Army relinquished Alcatraz to the U.S. Justice Department, which wanted a federal prison that could house a criminal population too difficult or dangerous to be handled by other U.S. penitentiaries.
Stroud was transferred to Alcatraz in 1942, where he spent the next 17 years (6 years in segregation in D Block and 11 years in the prison hospital). In 1959, he was transferred to the Medical Center for Federal Prisoners in Springfield, Missouri, where he died on November 21, 1963.