The Interrogation Tapes - Episode 4: Sins of the Father

The 20/20 story of the man whose wife and son died in what were first deemed horrible accidents, but suspicions around Karl Karlsen lead to an hours-long interrogation as detectives seek to unlock his family secrets.  The Interrogation Tapes was produced by ABC News Studios in partnership with 20/20. The series is now streaming on Hulu. Learn more about your ad choices. Visit megaphone.fm/adchoices