Rann Bunroth is reportedly being charged for failing to stop military policeman In Ratana from shooting Chut Wutty on April 26.
Cambodia has reduced the number of maternal deaths, meeting a 2015 goal early, health officials told VOA Khmer.
The government has established an investigative committee, and two men have been detained for questioning in the April 26 shooting.
Wutty's death provoked outrage from rights groups, who claim the government frequently turns a blind eye to illegal logging.
Prime Minister Hun Sen said Tuesday a joint government committee will investigate the shooting.
Shots were fired after a lengthy argument between Chut Wutty and the officials, who appeared to be military policemen.
Miners here say hundreds of families from various regions in the province have come to the area since last year.
A Thai company says it is going ahead with construction of the controversial $3.5 billion Xayaburi dam on the Mekong River in Laos.
A military police spokesman told local media that officers shot at Wutty, and that one military police officer was killed in the exchang
The World Health Organization (WHO) says malaria threatens 2.2 billion people in 20 countries across the Asia Pacific region.
The World Bank subsequently froze its funding to Cambodia, pending more results in curbing land grabs.
Skyscrapers are Cambodia's new symbols of prosperity and modernity.