Eugene Alexander de Kock (born 29 January 1949) is a former South African Police colonel, torturer, and assassin, active under the apartheid government. Nicknamed "Prime Evil" by the press, De Kock was the commanding officer of C10, a counter-insurgency unit of the SAP that kidnapped, tortured, and murdered numerous anti-apartheid activists from the 1980s to the early 1990s. C10's victims included members of the African National Congress.