 On June 4, 2013, state media announced that Ni was being investigated by the Central Commission for Discipline Inspection of the Communist Party of China for "serious violations of laws and regulations".The party investigation concluded that Ni had abused his power to seek benefit for others, taken "massive amounts" in bribes, and was "morally depraved".On September 30, 2013, he was expelled from the Communist Party of China, and sacked from all his government posts.