A senior producer at NHK said Wednesday he does not trust the results of an in-house probe into allegations that the public broadcaster altered a documentary program about a mock trial on Japan's wartime sex slavery aired in 2001 due to political pressure.

Satoru Nagai had asked NHK's compliance panel in December to investigate the case, claiming the company violated the Broadcasting Law, which guarantees freedom of broadcasting, when it was pressured by Liberal Democratic Party heavyweights Shinzo Abe and Shoichi Nakagawa .

"I cannot trust the results of the probe led by the current top managers who sold their souls to politicians," Nagai said in a statement.