Two Cambodian-Americans visit their homeland in these documentaries. Jocelyn Glatzer's wrenching The Flute Player focuses on Arn Chorn-Pond, who as a boy was forced to play propaganda songs for the Khmer Rouge and help them carry out murders. Chorn-Pond, who's haunted by guilt, seeks out others who suffered, and their varied stories remind us that there are no good choices in a time of mass murder, though one hopeful sign is Chorn-Pond's current work with Cambodian and Latino gangs. Spencer Nakasako's Refugee follows Mike Siv, a boy who came here with his mother when he was three. His disappointment over his father's self-serving explanation for the family breakup is affecting, but the storytelling style is reminiscent of a home-movie travelogue. In English and Cambodian with subtitles. 112 min.