002/19-09-2007-ECCC-OCIJ ЮŲŠ / No: D427 located in the vicinity of Tlork Pagoda,2804 and a series of burial pits.2805 A memorial stupa containing human remains exhumed from the burial pits is located in the village.2806 In response to a Civil Party request, it was established that when Wat Tlork was closed the remaining prisoners were transferred to another Meanchey Thmei District security centre located at Boeung Rai Village in Kraol Ko Subdistrict, 10 kilometres to the west.2807 645. The CPK expelled the monks from Wat Tlork Pagoda before 17 April 1975.2808 Witnesses also state that Wat Tlork was established shortly after this date,2809 through relocation of the population and staff of a pre-1975 security centre located at Meun Say Village (Angk Ta Sau Subdistrict) 6 km northwest of Tlork Village.2810 Wat Tlork appears to have remained in operation2811 as the Meanchey Thmei District security centre,2812 until its functions,2813 and the last remaining prisoners were transferred to Boeung Rai in early 1978,2814 following Vietnamese incursions in the area.2815 Functioning of Wat Tlork Structure and Personnel 646. Witness evidence confirms that the chain of command implemented by the CPK nationwide operated in Sector 23 during the DK period. The subdistricts reported to the district committee, which reported to the sector committee.2816 The composition of these committees varied over time, particularly after the purge of Meanchey Thmei District in late 1977 / mid-1978. It appears that Uk Savan alias Sau was Sector 23 Secretary (arrested and sent to S-21 on 18 March 1978), and appears to have been replaced by Chan alias Seng Hong;2817 and that there was a sector security office, whose leading cadre were also purged by mid-1978.2818 647. During the CPK period, Svay Rieng District was divided and Wat Tlork became located in the new Meanchey Thmei District (later renamed Svay Chrum District).2819 Witnesses2820 and documents2821 identify two apparently successive Meanchey Thmei District Secretaries, Khieu Samith and Phoeng Son alias Say, both apparently purged (Phoeng Son alias Say entered S-21 on 27 March 1978); and Ath, the Tlork Subdistrict Secretary. 648. Witnesses state that the Chairman of Wat Tlork supervised the Subdistrict security centre secretaries and made decisions about arrests.2822 One witness stated that communication was by messenger,2823 and at the lower level, orders were received orally.2824 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. 163