Son Sen (June 12; 1930 - June 10; 1997); member of the Central Committee of the Communist Party of Kampuchea; aka the Khmer Rouge; from 1974 to 1992; Sen oversaw the Party's security apparatus; including the Santebal secret police and the notorious security prison S-21 at Tuol Sleng. Son Sen was married to Yun Yat; who became the Party's Minister of Education and Information. Along with the rest of his family; he was killed on the orders of Pol Pot during a 1997 factional split in the Khmer Rouge at Anlong Veng.