Ieng Sary, alias Van, was the Minister of Foreign Affairs of Democratic Kampuchea and member of the Central and Standing Committees of the Communist Party of Kampuchea (CPK). He is accused of having directed, encouraged, enforced or otherwise rendered support to CPK policy and practice between April 1975 and January 1979 which was characterized by murder, extermination, imprisonment, persecution and other inhuman acts such as forcible transfers of the population, enslavement and forced labour.
On 14 November 2007, Ieng Sary was placed in provisional detention with his wife Thirith, and charged by the ECCC with crimes against humanity (murder, extermination, imprisonment, persecution and other inhumane acts) and grave breaches of the Geneva Conventions (willful killing, willfully causing great suffering, unlawful deportation or transfer or unlawful confinement of a civilian).
On 14 January 2010, the Co-Investigating Judges of the ECCC concluded the investigation regarding Ieng Sary and the other Khmer Rouge leaders, Ieng Thirith, Nuon Chea, Khieu Samphan and Kaing Guek Eav.
On 11 May 2011, the Trial Chamber stated that the first hearings in Case 002 are scheduled to begin on 27 June 2011.