 De Kock served his sentence in the C Max section of the Pretoria Central Prison.In a local radio interview in July 2007, De Kock claimed that former president FW de Klerk's hands were "soaked in blood" and that de Klerk had ordered political killings and other crimes during the anti-apartheid conflict.These claims were in response to de Klerk's then-recent statements that he had a "clear conscience" regarding his time in office.