Did She Marry an Ax Murderer? Part 1

Sometimes the person you love isn't who you think they are. Sharon Krauseneck says she and her husband Jim were happily married. But in 2016, to Sharon's surprise, her husband's alleged dark past caught up to him. In 1982, Jim's first wife, Cathy, was murdered with an ax lodged in her head. The case went cold until a well-known forensic pathologist shed new light on crucial evidence 34 years later. Erin takes you deeper into the "48 Hours" investigation, "The Brighton Axe Murder".