When 56-year-old David Lunz is gunned down in his Palm Harbor, Florida home, this laid back community fears the worst. It takes investigators more than two years and a surprise clue found 600 miles from the crime scene to nail a killer from David's past.Season 1, Episode 15 originally aired on ID  on August 25, 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.