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 imprisoned at Alcatraz from 1942 until 1959. It was determined that Stroud was abusing his research privileges and sent to Alcatraz. Stroud was widely disliked by many fellow inmates and correctional officers. See other links for more detailed information.