The Minnesota man told police that, during a struggle with an intruder, his shotgun went off twice, wounding him and killing his wife. What happened inside the home? Watch the full 20/20 'Stranger In The House' - Friday, March 27th at 9/8c on ABC. Stream on Disney+ and Hulu under S45, E27. #HeidiFirkus #NickFirkus #Investigation #Solved