Meanwhile, two suspects in those cases told VOA Khmer this week they would be relieved to have the cases dropped.
The court is currently trying three more top leaders of the regime, but many critics say this is as far as the hybrid court will go.
Kaing Kek Iev, better known as Duch, had appealed to reduce his 35-year-term.
Duch, who is 69, was handed a commuted sentence of 19 years at the end of his atrocity crimes trial in 2010.
Some of Wednesday’s female protesters tore off their shirts as they faced off with riot police carrying batons and shields.
Defense attorneys for three jailed regime leaders have challenged the authenticity of documents from the well-established organization.
The ruling Cambodian People’s Party received about 78 percent of the votes, with the opposition Sam Rainsy Party taking the remainder.
Hun Sen said Tuesday he would take back land concessions if the violence continues.
Nil Nonn, head judge of the Trial Chamber, stopped him and reminded him to keep his questions limited to the case at hand—No. 002.
Nearly 80 land cases involved government land concessions that affected more than 30,000 families.
Bou Meng and Chhum Mey spend less time at the trial of Khmer Rouge leaders these days, and more time at the torture center they both survived.
Sia Phearum told “Hello VOA” people are being forced off land they earned through “backbreaking” work.