In a BBC Four documentary (Pol Pot’s Executioner: Welcome to Hell – May 2011), a torturer said that the only way he could have tortured his victims was to regard them as animals, as he was required to do. The practice of dehumanising prisoners by relating to them only as a number was part of this process, as it was in the Nazi death camps. A torturer might be opposed to torturing prisoners but have justifiable fears of being killed and perhaps tortured to death himself if he refuses to do so, which presumably would set up conflicting signals in his brain patterns. But there are those, such as Duche, the notorious Non Pen camp commandant during the Pol Pot regime, who oversaw and implemented the extreme methods. His state of mind must somehow have been able to override a brain state of distress. Harris writes about understanding psychopathic behaviour in terms of brain pathologies. However, there is also Hannah Arendt’s phrase for the Nazi atrocities, “the banality of evil”, and Duche’s ordinariness comes across in the documentary.