Four more suspects have yet to have defense attorneys put forward to the court.
Hun Sen has begun regularly denouncing the opposition on the airwaves, with July’s national election approaching.
The prison was at the center of the court’s first trial, which ended in the conviction of Kaing Kek Iev for atrocity crimes.
Philip Short’s testimony over the past four days has highlighted weaknesses of the regime and given historical and geopolitical perspective to the trial.
Much of his testimony on Tuesday was centered around the relationship between the regime and Vietnam, which would eventually become its enemy.
Long Panhavuth, a program officer at the Cambodia Justice Initiative, told “Hello VOA” Thursday that the court still has a chance to give hope to victims who crave justice.
The court, which stood up in 2006, has so far only convicted on Khmer Rouge prison chief, Duch, for his role in supervising the infamous torture center of Tuol Sleng.
Khieu Samphan is on trial for atrocity crimes, including genocide, alongside Nuon Chea, the regime’s chief ideologue.
Continued funding woes, the advanced age of the last two leaders on trial and other complexities mean the court might not finish its work as originally intended.
Francois Ponchaud, 74, who arrived in Cambodia in 1965, told the court the Khmer Rouge were known for atrocities in the villages before taking over Phnom Penh in April 1975.
The $2 million will help the Cambodian side of the UN-backed court pay the salaries of its Cambodia staff, who have not been paid since December.
The Day of Remembrance is recognized by the state of Illinois and receives some funding and support from the state.