When Austin York, Matt Self, Mark Barbosa, and Rosa Barbosa are found dead in a McKinney, Texas home, detectives embark on a three year investigation. And just when it seems like the murders may never be solved, an eyewitness breaks the case wide open.Season 1, Episode 4 originally aired on ID on January 13, 2011.Stream full episodes of Nightmare Next Door on discovery+. Go to discoveryplus.com/nightmarenextdoor to start your 7-day free trial today. Terms apply. See acast.com/privacy for privacy and opt-out information.