Legal basis:
Article 160 of the Criminal Procedure Law: When investigating a closed case, 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.
Article 161 In the course of investigation, if it is found that the criminal suspect should not be investigated for criminal responsibility, the case shall 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.