i have a friend who was surrounded by three persons, attempting to jump him, and was able to defend himself. the persons then filed charges on him, and because of a harsh biased judge threatening to give him the full sentence of a 2nd degree assault charge, he took a plea bargain, but cannot find work because of his record. if by chance one of the persons confesses their intentions, can he be pardoned? or are there any other ways to reverse the conviction?