Frontline: A Death in St. Augustine

On the night she broke up with her boyfriend, a Florida deputy sheriff, Michelle O'Connell was found dead from a gunshot in the mouth. Next to her was her boyfriend's semi-automatic service pistol. The sheriff's office called it suicide, but was it? FRONTLINE and The New York Times investigate this death, and what can go wrong when the police are faced with domestic violence allegations within their own ranks.