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. The Khmer Rouge, or Communist Party of Kampuchea, ruled Cambodia from 1975 to 1979, led by Pol Pot, Nuon Chea, Ieng Sary, Son Sen and Khieu Samphan. It is remembered primarily for its brutality and policy of social engineering which resulted in millions of deaths. Its attempts at agricultural reform led to widespread famine, while its insistence on absolute self-sufficiency, even in the supply of medicine, led to the deaths of thousands from treatable diseases (such as malaria)