002/19-09-2007-ECCC-OCIJ ЮŲŠ / No: D427 the prisoners.1880 Apart from cases in which S-21 made arrests as described below, Duch was notified that prisoners were due to arrive through lists, which were prepared and sent by Son Sen, Nuon Chea or Ken alias Lin.1881 435. S-21 personnel themselves sometimes made arrests.1882 According to Him Huy, where S-21 made arrests outside its premises, but within Phnom Penh, there were two possible scenarios: either his unit made the arrest, or, if the arrest had already been made, his unit was only responsible for the transfer of the prisoners to S-21.1883 Him Huy states that he was dispatched from Phnom Penh on several occasions to bring prisoners to S-21, and in each of these cases, Duch gave him a list of the people to be arrested.1884 Duch states that whenever necessary, a special S-21 unit left Phnom Penh bearing an order issued by the Central Committee and a special pass signed by Son Sen, authorising it to bring prisoners back to S-21. However, he adds that this system was subsequently discontinued.1885 Furthermore, Duch explains that he was sometimes consulted and was involved in the planning of arrests, particularly when it involved arresting a large number of people within one unit, or when the persons to be arrested were prominent members of the Party.1886 Lastly, the arrests of some important persons, such as Koy Thuon and Pang, took place in Duch’s house.1887 436. Duch indicates that when the decision to make an arrest was made, secrecy and trickery were mandatory in order to avoid leaks, and prevent any attempts to resist, especially when a large number of people had to be arrested in the same location.1888 In such cases, according to Duch, he asked Hor to speak to the head of the unit and urged him to “calm the staff” and make sure that he was methodical in making the arrests.1889 Arrest of Vietnamese civilians and soldiers 437. The Arrest of Vietnamese civilians and soldiers generally took place in the main conflict zone (along the border with Vietnam) or nearby.1890 Former military commander [REDACTED] says: “all of the Vietnamese soldiers who were captured along the border near Svay Rieng and Prey Veng Provinces were sent to Phnom Penh. Initially, they were sent to Rèn At the decision headquarters, and he decided what was to be done with them … I think this group was sent to Duch at S-21, but I am not certain, because at that time we seemed to be in a dark world; many things happened that we did not know about, and movement was extremely strict”.1891 438. It appears that at least some, if not all,1892 of the Vietnamese civilians and soldiers arrested in the main conflict zone were detained at S-21. Duch explains that he was only informed of Extraordinary Chambers in the Courts of Cambodia, National Road 4, Choam Chao, Dangkao Phnom Penh Mailing address: P.O. Box 71, Phnom Penh; Tel: +855(0)23 218914 Fax: +855(0) 23 218941. 113