In 1980, Marilyn McIntyre was discovered dead in her Wisconsin home by her husband, Lane McIntyre. Police initially investigated Lane and his friend as a potential suspects, but the case stalled for nearly thirty years. In an effort to reignite the case, Marilyn's niece reached out to investigators. A call to a wrong number and new evidence would expose the killer. “48 Hours" Correspondent Erin Moriarty reports. This classic "48 Hours" episode last aired on 4/30/2011. Watch all-new episodes of “48 Hours” on Saturdays, and stream on demand on Paramount+.