Shadowfall.

Typically thieves enter a house, steal things and get out. This time an unsuspecting thief enters a home to steal as much as he can and instead is faced with an occupant inside the house. There is a woman within who is going to commit a murder. She is also about to set the place ablaze. The thief stops her and in the process the criminal becomes the one stopping a crime. The situation is connected to a case from some twenty years go.