>> more than two decades into a 70-year prison sentence, the baby is now a man fighting for his father's release. >> i never once had a doubt that he hurt me. i don't believe it. >> how did it happen? >> it is a bad diagnosis. >> now new evidence. >> the healing had already started at this point. >> could end a family's nightmare. >> if he was out here right now, i would never let him go. >> tonight a cnn special report. broken bones, shattered lives. oil city, pennsylvania, april 1995. jim duncan was doing one of his favorite things. goofing off with his sons, kevin