The movie is, overall, about facing the consequences of your actions under any circumstances (including not letting others lie or cover up). It also tries (even though it may not fully succeed) to portray immigrants from Mexico in a positive light -- though the story is told by White men.
Guns and shooting; characters killed and funeral shown. Switchblade drawn, character stabbed in shoulder. Bloody wounds. Someone beats up the main character, who fights back with rope. Villain hit in the head with a rock. Dead body (barely seen in darkness). A mother slaps her grown son. Cow's leg caught in barbed wire. Cactus barbs stuck in character's hand. Jump from high place, with injured ankle. Character dragged from car, slammed up against wall. Many painful bruises.
A somewhat obscured use of "f--k," plus "s--t," "a--hole," "ass," "goddamn," "bitch," "damn," "hell," "douchebag," "puto," and "shut up." Also tThank God." "Son-of-a-..." is said but not completed.
Teens smoke in some scenes. Brief beer-drinking in bar. Tequila shots in bar.