Timbers are allegedly burned in Mondulkiri province as the government threatens a crackdown on forest crimes.
Human Rights Watch and Freedom House issue their annual reviews of how governments in the region stepped up repression in 2015.
The government agrees to send 13 Montagnards to the Philippines to wait for asylum, and says it will consider petitions by many others.
Critics say an investigation into his 2004 death is merely for show.
The mine had been operating in Siem Reap province with expired government-issued licenses.
The prime minister has threatened to dismiss the governor of Tbong Khmum province, through which much of the timber is smuggled to Vietnam.
Mystery illness follows cases of poisoned food and wine sickening villagers in the area.
Strong laws are needed to restrict the practice which is rife throughout Cambodia, Transparency International says.
They say authorities in Sam’ang commune in the Thala Barivat district of northeastern Cambodia’s Stung Treng province are in cahoots with business groups cutting down trees in a wildlife sanctuary.