Teenage drug dealers in swank southern California, determined to collect from a stubborn client, kidnap his 15-year-old brother (Anton Yelchin), but the kid has the time of his life being a hostage. Apart from the grim forebodings of tragedy, writer-director Nick Cassavetes seems to have modeled this ambitious, fictionalized account of a true story on Larry Clark’s kiddie-porn shockers, but he doesn’t know what to leave out, and the movie becomes excessively complicated with ancillary agendas. The actorsincluding Emile Hirsch, Ben Foster, Bruce Willis, Sharon Stone, and Harry Dean Stantonham it up even as Cassavetes keeps swerving away from them for new distractions. With Justin Timberlake. R, 117 min. (JR)