Born in the Hill District of Pittsburgh, Bell received a B.A. from Duquesne University in 1952. He was a member of the Duquesne Reserve Officers' Training Corps and later served as an Air Force officer for two years (stationed in Korea for one of those years). In 1957 he received an LL.B. from the University of Pittsburgh School of Law. After graduation, and after a recommendation from then United States associate attorney general William P. Rogers, Bell took a position with the civil rights division of the U.S. Justice Department. He was one of the few black lawyers working for the Justice Department at the time. In 1959, the government asked him to resign his membership in the National Association for the Advancement of Colored People (NAACP) because it was thought that his objectivity, and that of the department, might be compromised or called into question. Bell left the Justice Department rather than giving up his NAACP membership.