The demonstrators were seized Wednesday, where they had demanded the courts release eight representatives arrested earlier this month.
Around 300 families lost their homes in the Jan. 3 forced eviction of Borei Keila.
An estimated 20,000 Cambodians are trafficked throughout the region each year.
Cambodia and other Asean countries have adopted a draft of a charter for human rights that will see rigorous debate next month.
The site, at Phnom Bath mountain, is 50 kilometers outside the capital and lacks clean water, electricity, and health care facilities.
Moek Dara is accused of abusing his post to gather hundreds of thousands of dollars in bribes and organizing drug trafficking.
According to Adhoc, there are more than 15,000 prisoners nationwide in a detention system that cannot hold them.
Abney’s injury in the attack prompted an FBI investigation that was ultimately abandoned.
Chea Vichea was a powerful labor leader able to amass large rallies, his killers have never been brought to justice.
At least 20 people, including some police and military police were injured, and at least 12 people were arrested.
Thailand forcibly returned more than 100,000 Cambodians last year.
Chhoung Chu Ngy briefly disappeared on Thursday last week, but he appeared shaken before a press conference on Friday.