Documents pertaining to CPK Military Division Chairmen Sou Met and Meah Mut provide compelling evidence of their direct involvement in the arrest and transfer to S-21 for execution of cadre from their Divisions. The evidence similarly suggests that both officials may be responsible for arrests and executions perpetrated by subordinates in their respective Divisions.

a) Evidentiary Analysis

i. Positions and Roles in the CPK

Sou Met and Meah Mut are two surviving CPK cadre who held predominantly military ranks within the CPK just below the senior level, which positioned them to implement Party policies and influence the conduct of lower-level cadre.

Sou Met was Secretary of Central Committee Division 502, which incorporated the DK air force, and Meah Mut was Secretary of Central Committee Division 164, which incorporated the DK navy. Both had risen through the military ranks of the Southwest Zone and had family connections to its leadership.

Met was the son of the late Ma Mâng alias Pang, who until his death in 1968 had been Secretary of the Southwest Zone.

Meah Mut was the son-in-law of Mâng's successor, Ta Mok.

Sou Met may have joined the Central Committee in November 1978, when he became a Standing Member of the General Staff Committee chaired by Son Sen. Of the seven officials who are the subject of this report, Met and Mut occupied positions which most clearly fell within the military hierarchy of the CPK, through the General Staff under Son Sen. As indicated in Part III, Son Sen, who was killed in 1997, was a member of the Central, Standing and Military Committees and was deeply implicated in CPK atrocities.