Kang Kek Iew, also spelled Kaing Guek Eav, alias Comrade Duch or Hang Pin, was a Cambodian convicted war criminal and member of the Khmer Rouge movement, which ruled Democratic Kampuchea from 1975 to 1979. As the Chairman of Tuol Sleng (S-21) prison camp, and head of the Santebal, Kang Kek Iew was responsible for the interrogation and torture of thousands of individuals, and was convicted for the execution of at least 12,272 individuals, including women and children, but up to 14,000 in total could have died under his oversight.