The Khmer Rouge slaughtered nearly two million people in the late 1970s. Yet the “killing fields” of Cambodia have remained largely unexplained. Until now, in Enemies of the People. Enter Thet Sambath, an unassuming, yet cunning, investigative journalist who lost his family in the conflict and spends a decade gaining the trust of the men and women who perpetrated the massacres. Sambath and co-director Rob Lemkin record shocking testimony, never before seen or heard, from the foot soldiers who slit throats and from Pol Pot’s right-hand man, the notorious Brother Number Two. Winner of the 2010 Sundance World Cinema Documentary Special Jury Prize. (90:00)