Sam Rainsy left Cambodia in 2016 facing a number of lawsuits filed by senior officials.
More than 100 medical practitioners will take part in the mission, which is the ninth annual mission carried out by CHPAA.
The documentary, “My Mother Sold Me”, which aired in October, depicted a young Cambodian woman apparently selling her daughter’s virginity.
Cambodia’s score has dropped 4 points to 26 out of 100.
In a report released on Tuesday, Human Rights Watch said the government should enforce laws the require legal, social and medical support services are provided to survivors.
Cambodia has an estimated 7 million social media users and almost 11 million Cambodians use the Internet.
More than 1 million Cambodians are reported to migrate to Thailand each year, working in factories, plantations, and in the fishing industry.
The Khmer Rouge regime held power between 1975 and 1979, during which time some 1.7 million Cambodians are estimated to have died as a result.
While the capital of Phnom Penh undergoes a building boom and makeover, its poor cram onto scraps of land, including Smor San
U.S. Vice President Mike Pence expressed concern over the report in a letter to Prime Minister Hun Sen, whose government denied the allegation.
Army chief Apirat Kongsompong arrived on Tuesday and met with Cambodian army commander Hun Manet and Defense Minister Tea Banh.
Venerable Luon Sovath spent two months touring the UK, with filmmaker Chris Kelly standing in as his “pagoda boy.”