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Following the conviction of Kaing Guek Eav, better known as Duch, in the first trial of a former senior Khmer Rouge official in Cambodia, attention is now on the four other former officials of Pol Pot's regime in custody.

Their trial is expected to start next year, and it could take up to two years before a verdict is reached.

But with all the defendants ageing and in poor health, the pressure is on to get their cases under way.

Harry Fawcett explains.

Source: Al Jazeera