This film was so gripping that it seemed life outside the theater walls melted way. It provokes so many questions as well. SPOILER I would love to hear theories on why Moss went back the crime scene. He barely looked at the dying Mexican man, let alone felt sympathy for him. Then, as he replays the day’s events which are depriving him of sleep, he decides to go back. I immediately thought he realized to keep the money, it was necessary to kill the only man who could identify him – leaving no loose ends. But to bring him water?! He must have brought the water to soothe his conscience…to mask the ugliness he was preparing to commit. I can't believe he would risk his life to save this man. It especially bothers me because his return is the catalyst for the rest of the story. Anyone want to chime in here?