 He collected 50 pages of details of murders, rapes, beatings and other abuses suffered by the inmates from 1969 to 1971 at Mississippi State Penitentiary.In a landmark case known as "Gates v. Collier" (1972), four inmates represented by Haber sued the superintendent of Parchman Farm for violating their rights under the United States Constitution.Federal Judge William C. Keady found in favor of the inmates, writing that Parchman Farm violated the civil rights of the inmates by inflicting cruel and unusual punishment.