
Koy Thuon
Alias : Thuch, Khuon1
KOY Thuon (1933-1976) was Minister of Commerce and member of the Central Committee. He was interrogated by Duch at S-21 and subsequently executed.
Explore the Khmer Rouge hierarchy to understand his role in the secretive system.

Key Findings
The Trial Chamber in Case 002/01 and Case 002/02 found that Koy Thuon:
- Was a member of a joint criminal enterprise with CPK leaders with the common purpose to “implement rapid socialist revolution through a ‘great leap forward’ and defend the Party against internal and external enemies, by whatever means necessary.” 13
- Held meetings in his Zone concerning implementation of the Party’s line and attended meetings at which the Party line was decided upon. 14
- Shelled Phnom Penh with rockets and other ordnances with forces under his joint command with Son Sen. 15
- Was implicated in S-21 confessions, arrested by S-21 staff at Duch’s house, and sent to S-21 where he was interrogated by Duch, following which hundreds of people were arrested, detained, and killed from the North Zone in early 1977. 16
Disclaimer
Koy Thuon was not a suspect, charged person, or accused in any proceedings before the ECCC. Therefore, the findings of the Extraordinary Chambers cannot be equated to findings of guilt against him.
Some information may be sourced from confessions which were obtained under torture. The reliability of such information should be treated with caution. See Decision on Evidence Obtained Through Torture.
Drag
1933
Born.2
1970
5 May
Became Vice-Minister of Economy and Finance in the newly formed the Royal Government of the National Union of Kampuchea (“GRUNK”).3
1971
September
Appointed to the Central Committee as alternate member at the Third Party Congress.4
1974
June
Met other CPK leaders in Meak village in Prek Kok commune to discuss plans for the final assault and evacuation of Phnom Penh and other urban centres.5
1976
March
Appointed by the Standing Committee to assist Khieu Samphan in the examination and preparation for merchandise which must be purchased from China and examination of “the matter of banks.”9
Related Documents
Closing Orders
- Case 002 Closing Order, D427: Part One: II Administrative Structures; VII. Factual Findings on Joint Criminal Enterprise.
Judgments
- Case 001 Judgment, E188: 2. Factual and Legal Findings; 2.3 S-21 and the Role of the Accused; 2.4 Facts relevant to crimes against humanity committed at S-21.
- Case 002/01 Judgment, E313; 3. Historical Background; 5. Administrative Structures; 14. Joint Criminal Enterprise.
- Case 002/02 Judgment, E465: 3. Historical Background; 5. Administrative Structures; 12. Security Centres, Execution Sites, and Internal Purges; 16. Common Purpose.
Evidence
- Standing Committee Minutes, 2 November 1975, E3/227.
- Standing Committee Minutes regarding national defence matters, 22 February 1976, E3/229.
- Standing Committee Minutes regarding economic matters, 22 February 1976, E3/230.
- Standing Committee Minutes, 28 February 1976, E3/238.
- Standing Committee Minutes regarding the eastern frontier, 11 March 1976, E3/217.
- Standing Committee Minutes, 13 March 1976, E3/233.
- S-21 Confession of Koy Thuon, multiple dates, E3/1604.