Waugh and sharp-eyed cinematographer Dana Gonzales keep their framing quite tight, which amplifies the actors’ work but, more ambiguously, keeps you worried about what might be going on outside the field of view. A very large contribution is made by Brazilian composer Antonio Pinto ("City of God,’’ ‘'Senna,’’ ‘'Get the Gringo"), whose eerie, ever-hovering electronic score gathers cumulative force to greatly amplify the story’s power.
‘‘Snitch,’’ a Lionsgate/Summit release, is rated PG-13 for drug content and sequences of violence. 112 minutes.
Motion Picture Association of America rating definition for PG-13: Parents strongly cautioned. Some material may be inappropriate for children under 13.