A special investigative committee declared the case closed on Saturday, citing testimony from three witnesses.
The rights group Adhoc reported in March an increase in land concessions that ranged from 70 to 99 years.
Around 200 residents of the embattled Boeung Kak lake neighborhood gathered outside Phnom Penh court on Friday.
Rann Bunroth is reportedly being charged for failing to stop military policeman In Ratana from shooting Chut Wutty on April 26.
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.
A military police spokesman told local media that officers shot at Wutty, and that one military police officer was killed in the exchang
The men were charged under the new penal code and will face an investigation.
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Police said the assault occurred when one of the purported victims and a security guard attempted to retrieve a necklace from the room.