Complex sentence: Peter eventually decides to return to his old house to confront his memories and, with Ann's help, realizes that he did not kill his family; a local man named Boyce (Elias Koteas) broke into the house and shot Peter's wife and daughters.
Split into simpler sentences: Peter eventually decides to return to his old house to confront his memories and, with Ann's help, realizes that he did not kill his family. It was a local man named Boyce (Elias Koteas), who broke into the house and shot Peter's wife and daughters.