Focusing on the exploits of the real-life Puccio family, which in the early 1980s kidnapped and murdered several people in suburban San Isidro, just north of Buenos Aires, The Clan is technically unimpeachable and depressingly bland. Its director, Pablo Trapero, recently won the Silver Lion at the Venice Film Festival, a distinction he deserves more for his career than for his latest output. He’s one of the emblems of the Argentine New Wave, having come into prominence, 15 years ago, with gritty, urban fare like Crane World and El Bonaerense. Since then, he’s tackled more expensive projects, most notably White Elephant, and has sought to harmonize his patented style with more conventional and industrial models, to middling results. The Clan, his most financially successful film to date, and probably his best since Lion’s Den, still sees him struggling to find his voice in mainstream territory.