With claims of witness interference and bribery surrounding the trial of the Khmer Rouge leaders, justice for victims may be further away than was hoped, writes Simon Roughneen in Tik Panhao, Cambodia

Nuon Chea, the top surviving leader of Cambodia’s notorious Khmer Rouge, whose radical policies were responsible for the deaths of an estimated 1.7 million people, was charged today with crimes against humanity and war crimes.

A thorough investigation must be made into corruption allegations against Cambodian officials at the Khmer Rouge tribunal, a New York-based legal group said.