Global Witness alleges that Hun Sen has used his position as prime minister to enrich his family's wealth.
A verdict in the case is expected on Friday.
Hun Sen has accused the opposition of trying to use the rule to argue for the release of the prisoners, which he said was a violation of the separation of powers.
Kem Sokha said that if any disputes over the selection process arose the final decision would be put to a vote.
During Barack Obama’s eight years as US president he left his mark across the world, including on Cambodia.
Initiated by Plan International Cambodia and local partnerships, Yeun Jas Primary School in Yeun village, Kak commune, was built in 2015 by local residents.
Hun Sen also apologized to reporters who had not been issued invitations to the event, including US-funded outlets such as VOA and Radio Free Asia.
The release of a video of the incident on social media prompted uproar and mockery as it seemed to show Puthy’s car stationary when the officer fell to the ground.