Biography
George Greene was a Greenwood civil-rights organizer who worked with SNCC and the NAACP youth movement. His 1963 imprisonment included the Leflore County Penal Farm and Parchman. He continued voter-registration work after release.
Photo credit
Charles Payne’s interview-based history describes George Greene and MacArthur Cotton sharing a cold, unlit punishment cell at Parchman for ten days, with too little space to lie down. This is a description of conditions within the existing imprisonment period, not an additional custody term.
Source: Charles Payne, I’ve Got the Light of Freedom, PDF page 158.