PHNOM PENH, Cambodia (AP) -- Decades after Cambodia's brutal Khmer Rouge movement oversaw the deaths of 1.7 million people by starvation, overwork and execution, the regime's imprisoned top leaders are escaping justice one by one. How? Old age.
Thursday's death of 87-year-old Ieng Sary, one of the founders of the Khmer Rouge, has fueled urgent calls among survivors and rights groups for the country's U.N.-backed tribunal to expedite proceedings against the increasingly frail and aging leaders of the radical communist group, which ruled Cambodia from 1975 to 1979.
Ieng Sary's wife, former Social Affairs Minister Ieng Thirith, was ruled unfit to stand trial last year because she has a degenerative mental illness consistent with Alzheimer's disease. Only two top Khmer Rouge leaders -- ex-head of state Khieu Samphan, who is 81, and the movement's former chief ideologist, Nuon Chea, who is 86 -- remain on trial for charges they carried out some of the 20th century's most horrific crimes.
There are growing fears that both men could die before a verdict is rendered. Both are frail with high blood pressure and have suffered strokes.
"The defendants are getting old, and the survivors are getting old," said Bou Meng, one of the few Cambodians to survive Tuol Sleng prison, known as S-21, where up to 16,000 people were tortured and killed during the Khmer Rouge era. "The court needs to speed up its work."
"I have been waiting for justice for nearly 40 years," Bou Meng, 70, told The Associated Press. "I never thought it would take so long."
When the Khmer Rouge captured Phnom Penh in April 1975, they began moving an estimated 1 million people -- even hospital patients -- from the capital into the countryside in an effort to create a communist agrarian utopia.
By the time the bizarre experiment ended in 1979 with an invasion by Vietnamese troops, an estimated 1.7 million people had died in Cambodia, which had a population of only about 7 million at the time. Most died from starvation, medical neglect, slave-like working conditions and execution under the Maoist regime. Their bodies were dumped in shallow mass graves that still dot the countryside.
The tribunal, officially known as the Extraordinary Chambers in the Courts of Cambodia, was tasked with seeking justice for crimes committed during that era.
The court was 10 years in the making and opened in 2006. But despite some $150 million in funding, it has so far convicted only one defendant: Kaing Guek Eav, also known as Duch, the commandant of S-21 prison.
Duch was sentenced in 2010 to 35 years in prison for war crimes and crimes against humanity. The sentence was reduced to a 19-year term because of time previously served and other technicalities, a move that sparked angry criticism from victims who said it was too lenient. Cambodia has no death penalty.
Several other major Khmer Rouge figures died before the court even existed, including supreme leader Pol Pot in 1998.
Ieng Sary's death was no surprise given his age and ailing health, said Ou Virak, who heads the Cambodian Center for Human Rights. But "given the fact that the other two defendants are also in their 80s, it should act as a wake-up call to all concerned -- the Cambodian government, the U.N., the international donors and the tribunal itself -- that these cases need to be expedited urgently so that justice can be served."
"The whole future of the tribunal is currently in limbo, and the possibility that hundreds of millions of dollars will have been wasted is now a very real threat," Ou Virak said. "Most importantly, though, if all three die before their guilt or innocence can be determined, then the Cambodian people will quite understandably feel robbed of justice."
The court has been criticized before for the sluggish pace of proceedings. But one of its prosecutors, William Smith, said the trial has taken time because the indictments are lengthy and the list of alleged crimes long.
The tribunal has been dogged by other problems, including funding shortages from international donors. Earlier this month, Cambodian translators angry that they had gone without pay for three months went on strike just before the court was to hear testimony from two foreign experts.
The tribunal has also been hit by infighting and angry resignations by foreign judges over whether to try more Khmer Rouge defendants on war crimes charges. Human Rights Watch has also blamed Prime Minister Hun Sen, who has ruled Cambodia since 1985, for obstructing the court's search for justice.