Absolute Evil (2009)

Southern Texas. Savannah and Cooper, a young couple in love, drive through the desert in a black 70s Cadillac convertible. Unaware that they are being followed, they check into a motel at the Mexican border. When Savannah leaves to buy food, a cop sneaks into the room, pulls his gun on Cooper, accuses him of murder and tries to arrest him. But Savannah, who had become suspicious, manages to turn the tables.

Mystery, Thriller