NEW : He offers basic introduction of himself ; prison officials report probe 's findings . The trial is expected to last three or four months . Duch 's trial is taking place outside the Cambodian capital , Phnom Penh . Prison victims were military officials , Communist Party members . He , former prison chief , has no role in Khmer Rouge 's reign .
NEW : He offers basic introduction of himself ; prison officials report probe 's findings . Duch 's trial is taking place outside the Cambodian capital , Phnom Penh . Prison victims were military officials , Communist Party members . He , former prison chief , has no role in Khmer Rouge 's reign .