NEW YORK — More than 30 years after the murderous Khmer Rouge were driven from power in Cambodia, the U.N.-backed effort to bring justice to the victims of the killing fields stands on the brink of ignominious failure due to political interference from the Cambodian government and the indifference of the international community.

A hybrid court, the Extraordinary Chambers in the Courts of Cambodia, has spent over $200 million since it was set up in 2003 with both international and local judges and prosecutors. It has tried only one person: Kang Kech Eav, or Duch, the head of the notorious Tuol Sleng prison complex, who is appealing his conviction for crimes against humanity, murder and torture.

Now Cambodia’s Prime Minister Hun Sen has taken an axe to further proceedings. In power for over 25 years, Hun Sen has repeatedly and publicly declared that the court should try only one more case (case “002” in court parlance), against four detained senior ex-Khmer Rouge leaders, all of whom are in their late 70s or 80s.

As for five additional unnamed suspects, whom the court’s pre-trial chamber approved for investigation, Hun Sen bluntly informed U.N. Secretary General Ban Ki-moon late last year that they would not be “allowed” to go forward.