 The OCP is headed by the Cambodian National Co-Prosecutor (appointed by the Supreme Council of the Magistracy of Cambodia) and the International Co-Prosecutor (nominated by the United Nations Secretary-General), serving as co-prosecutors.The role of the OCP is to prosecute the senior leaders of the Khmer Rouge and others most responsible for the crimes committed during the period of Democratic Kampuchea.The OCP is responsible for the prosecution of cases throughout the investigative, pre-trial, trial and appellate stages.