Esperto di torture, nella Kampuchea Democratica diresse assieme a Deuch e Chan i crudeli interrogatori nella prigione S-21 di Phnom Penh.
Bibliografia Stephen Heder, Brian T. Tittemore. Seven candidates for prosecution: accountability for the crimes of the Khmer Rouge. War Crimes Research Office, Washington College of Law, American University and Coalition for International Justice, 2001; Full text.
Voci correlate Khmer rossi Khang Khek Ieu Mam Nay Pol Pot Tuol Sleng Cambogia Kampuchea Democratica
Collegamenti esterni Tuol Sleng Organizational Chart, from the "Cambodian Genocide Program" website, by Yale University.