塔莫
Following the Paris Peace Agreements of October 1991, Son Sen and Khieu Samphan traveled to Phnom Penh to negotiate with UNTAC and the Cambodian government in Phnom Penh. Sen was made a member of the Supreme National Council which was set up to protect the country's independence until UN-supervised elections could take place, and seems to have been more determined than most Khmer Rouge leaders to ensure that they were reintegrated into normal national politics. However, as a result Sen was removed from power in May 1992 by Ta Mok, after a dispute with fellow Khmer Rouge leaders over whether to continue the negotiations. From 1992 to 1997 he had relatively little influence within the Khmer Rouge.