Why was Butch Bosket released from prison as noted in the biography, All God’s Children?

While in prison, Butch met a Jewish political activist, who was in an adjacent cell and who gave him books, which he read. He started education courses in prison, working his way through high school and college with incredibly high grades. Becoming an erudite writer and an excellent and thoughtful student and computer programmer, Butch eventually went Phi Beta Kappa, the first prisoner in history to do so. On the recommendation of his professors, Butch was given parole after working his way to increasingly lower security prisons, until he was released.