 During his tenure on the bench, Marshall became known—by his own admission—as an activist judge, ordering the Chicago Police Department in 1976 to hire women and stop discrimination against black and Hispanic officers.He also ruled in 1982 that the random interrogation of Hispanics by what was then known as the Immigration and Naturalization Service was unconstitutional.Perhaps Marshall's best-known case, however, was a 1982 trial that sent the then-president of the Teamsters Union, Roy L. Williams, to prison for three years.