20/20 'Til Death Do Us Part' preview: Case of beloved Tennessee pastor killed at home

It seemed like life in the small town of Selmer, Tennessee revolved around the well-known and beloved church pastor Matthew Winkler. Matthew along with his wife Marry and their three daughters, we're seen as a perfect family--- until parishioners discovered their pastor's dead body in the family's home with Marry and the daughters were nowhere to be found. Watch the full video to know more!