Seeks freedom after serving 28 years-- Nathan Leopold (right) , thrill -slayer who has served 28 years in prison, talks with professor. William Byron, North Western University sociologist and Criminologist, at Stateville prison today shortly before Leopold appeared before the Parole board. Prof. Byron is at the helm of those arguing in favor of Leopold's Parole from prison. He and Richard Loeb killed 14-year-old Bobby Franks. January 08, 1953. (Photo by AP Wirephoto).