BEIJING — Wang Lijun, a Chinese police official who sought refuge at a U.S. consulate early this year, was formally charged Wednesday with defection, abuse of power, bribe-taking and what was described by the state media as “bending the law for selfish ends.”

The charges were filed with the Intermediate Peoples’ Court in Chengdu, the capital of Sichuan province where Wang had taken refuge in the consulate in February, the New China News Agency reported. Typically, such an announcement precedes trial by a few weeks.

Wang’s flight to the consulate unveiled the underside of Chinese officialdom, as he spilled an almost unbelievable tale of murder and deception — accusing the wife of Politburo member Bo Xilai of poisoning a British business associate.

Bo was ousted from his party posts after the scandal broke. His wife, Gu Kailai, was convicted last month of the murder.

The indictment of Wang was widely anticipated, although some had thought he might be charged with more serious crimes, such as involvement in the murder or treason for turning to the Americans. Instead, the charges filed appear to be relatively minor — the equivalent in U.S. law of dereliction of duty.

During last month’s trial of Gu, prosecutors claimed Wang knew in advance that she was planning to murder the victim, Neil Heywood, and helped cover her tracks. In the brief announcement Wednesday night, the state news service simply said that Wang “consciously neglected his duty and bent the law for personal gain so that (Gu) would not be held legally responsible.”

Wang, 52, is perhaps the most eccentric character in the burgeoning political scandal consuming China. An ethnic Mongolian, he was an inventor, amateur forensic scientist and flamboyant crime fighter who had been the subject of a fawning television drama. As police chief in Chongqing, where Bo was party secretary, he carried out Bo’s well-publicized arrests of thousands of suspected organized crime members.