Kong Vibol could face jail in Australia if pursued over allegations raised by Al Jazeera.
San Mala, Try Sovikear, and Sim Samnang were sentenced to 18 months in jail after they organized a protest against the company in April 2015.
The fact-finding mission began on July 5 in response to an alleged anti-democratic crackdown by Prime Minister Hun Sen ahead of a general election on July 29.
A President of the Cambodian Youth Party claimed Moeun Tola had stolen $300,000 of donations collected for Kem Ley’s funeral.
Some 30 local and international civil society groups had previously called for the court to drop the charges, saying the proceedings were politically motivated.
Chinese corporation Union Development Group (UDG) has forced more than 1,000 families from their homes over the past 10 years.
In January, Taiwan prosecutors said they found evidence that China's Taiwan Affairs Office promised to pay a Taiwanese politician $500,000 to run a website publishing articles promoting unification.
Five countries in Asia, already at high risk of slavery, are the most likely to see increase in modern slavery.
Kem Ley's supporters are still calling for an independent inquiry into his murder.
US cybermonitor says National Election Committee, Senate and ministries were breached.
Direct Access company will be demanding further compensation for lost earnings due to the environmentalists’ direct action campaign, according to a prosecutor.
Seven brides were returned from China, four en route to China in Vietnam and three girls between 13 and 16 years old were rescued in Thailand.