Complex sentence: Norma's father tells Arthur that Steward's car is registered to the National Security Agency (NSA) and allows Arthur to visit the house where Jeffrey killed his wife and left his daughter locked in the bathroom.
Split into simpler sentences: Norma's father tells Arthur that Steward's car is registered to the National Security Agency (NSA). He allows Arthur to visit the house where Jeffrey killed his wife and left his daughter locked in the bathroom.