legal ground
Article 162 of the Criminal Procedure Law of People's Republic of China (PRC) * * * The public security organ shall ensure that the facts of the crime are clear, the evidence is true and sufficient, write a prosecution opinion, and transfer it to the people's procuratorate at the same level for examination and decision together with the case file and evidence; At the same time, inform the criminal suspect and his defense lawyer about the transfer of the case. If a criminal suspect voluntarily pleads guilty, it shall be recorded and transferred with the case, and the relevant information shall be stated in the prosecution opinion. 163rd in the process of investigation, it is found that the criminal suspect should not be investigated for criminal responsibility, and the case should be dismissed; A criminal suspect who has been arrested shall be released immediately, issued with a release certificate and notified to the people's procuratorate that originally approved the arrest.