. >> prosecutors determined that trowbridge not only strangled his victim but sexually assaulted her77 years for robbery, murder and abuse of a corpse. he has served 15 and with good behavior could be out of prison by age 50. he lives in wabash's protective custody unit which houses inmates whose lives could be at risk in general population due to the nature of their crimes. his cellmate shares the same unusual pairing of convictions, murder and abuse of a corpse. he is serving 68 years. the victim was his ex-girlfriend, heather norris. >> it was a toxic relationship. it was love hate and i still very much love her. >> throughout the couple's three-year relationship, heather told her family that bean was abusive and even though he faced a trial on domestic abuse charges at the time of heather's murder he says he wasn't abusive. >> it was predicated on a lie. the lie is that we had a violent relationship. i'm not saying i'm without fault. but as far as what happened with her death, worst case voluntary manslaughter and best case self-defense. >> he insists they had an argument and hea