
The Lost Executioner by Nic Dunlop
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Prak Khan, a former interrogator at the S-21 Khmer Rouge detention centre at Tuol Sleng, where over 16,000 inmates were killed between 1975 and 1979. He is pictured in the grounds of Tuol Sleng, his former workplace.
Nic Dunlop / Panos Pictures/ Felix Features