"The people and the local press should know whether Surayud Chulanont has clarified anything about his Khao Yai Thiang plot," Prasong said.
He said he sympathised with PM's Office Minister Thirapat Serirangsan for having to rebut charges on Surayud's behalf without knowing all the issues involved.
Surayud's plot was located far away from the land allocated to villagers under a Cabinet resolution, hence there was no justification to encroach on the forest reserve, he said.
Surayud has been aware of the legal issues relating to his plot since December and should have asked authorities to check on the legality of his land possession, he said, calling for the prime minister to stop squatting on the forest reserve.
Prasong said he would not assess the outcome of the debate because the people could form their own opinion.
"The debate has been concluded but the legal proceedings might continue if victims evicted and jailed for encroachment will file a complaint questioning why they were arrested while Surayud is left untouched," he said.
He also stated that he would petition the National Counter Corruption Commission to look into the matter.