A man who was cleared in a murder from 30 years ago has now admitted his guilt. Authorities say the man can’t be brought to trial again though. Larry Thompson admitted to killing Maria Marshall in 1984. Her husband, Robert Marshall, is in jail serving 30 years to life for offering money to people to kill his wife. Thompson has been indicted in a 197 murder in Louisiana. Thompson made the admission to the retired investigator who led the charge to find the murder at the time.