"Dateline" is airing a special episode about Sarah Hartsfield. Here's everything you need to know to watch, live or later on, ...

Dateline: Unforgettable Season 7 Episode 9, “The Day Alissa Disappeared,” revisits the disappearance of 17-year-old Alissa ...

The suspicious death of Sarah Hartsfield’s fifth husband leads investigators to a past filled with failed romances and wild ...

Firefighters make a grisly discovery while responding to a fire at the house of Carmela and David Knight in a Toronto suburb.