The case of Xuanhan Feng Mingxiang’s husband killing his wife and children.

Criminal cases are investigated by the public security organs.

Criminal Procedure Law of the People's Republic of China

Article 18 Criminal cases shall be investigated by the public security organs, unless otherwise provided by law.

Crimes of corruption and bribery, crimes of dereliction of duty by state functionaries, crimes of illegal detention, crimes of torture and confession by state functionaries, crimes of retaliation, frame-up and illegal searches, and crimes of infringement of citizens’ democratic rights shall be filed and investigated by the People’s Procuratorate. If other major criminal cases committed by state functionaries taking advantage of their powers need to be directly handled by the People's Procuratorate, the case may be opened for investigation upon the decision of the People's Procuratorate at or above the provincial level.

Private prosecution cases are directly accepted by the People's Court.