Legal basis: Article 178 of the "Procedure Regulations for the Handling of Criminal Cases by Public Security Organs". After the public security organ accepts the case, if it considers that there are criminal facts that require investigation of criminal liability and is within its own jurisdiction, it shall file the case with the approval of the person in charge of the public security organ at or above the county level; if it considers that there are no criminal facts, or that the criminal facts are obviously minor and do not require criminal liability, or that there are In other cases where criminal liability is not pursued according to law, the case will not be filed with the approval of the person in charge of the public security organ at or above the county level. If a case involving a complainant is decided not to be filed, the public security organ shall prepare a notice of non-filing and serve it to the complainant within three days. If after deciding not to file a case, new facts or evidence are discovered, or if the original facts are found to be wrong and criminal liability needs to be investigated, the case should be filed promptly. Article 186 of the "Regulations on Procedures for Handling Criminal Cases by Public Security Organs": If any of the following circumstances are discovered upon investigation, the case shall be dismissed: (1) If there are no criminal facts; (2) If the circumstances are obviously minor and the harm is not great, the case shall be dismissed. It is not considered a crime; (3) the crime has passed the statute of limitations for prosecution; (4) the person has been exempted from punishment by an amnesty order; (5) the criminal suspect is dead; (6) other persons who are not held criminally responsible according to law. If it is discovered through investigation that there are criminal facts that require criminal prosecution, but the crime was not committed by a criminal suspect who has been filed for investigation, or some criminal suspects in the same criminal case are not worthy of criminal punishment, the investigation of the relevant criminal suspects shall be terminated and the investigation shall continue. case. Article 187 of the "Procedural Regulations on the Handling of Criminal Cases by Public Security Organs": If a criminal suspect needs to withdraw the case or terminate the investigation, the case handling department shall prepare a report on withdrawing the case or terminating the investigation and submit it to the person in charge of the public security organ at or above the county level for approval. When the public security organ decides to withdraw a case or terminate the investigation of a criminal suspect, if the original criminal suspect is in custody, he shall be released immediately and a release certificate shall be issued. If the original criminal suspect is arrested, the People's Procuratorate that originally approved the arrest shall be notified. If other compulsory measures are taken against the original criminal suspect, the compulsory measures shall be lifted immediately; if administrative handling is required, they shall be handled in accordance with the law or transferred to relevant departments for handling. Unless otherwise dealt with in accordance with laws and relevant regulations, the property, interest, documents or frozen property that have been sealed or detained shall be lifted from the seal, seized or frozen, and shall be promptly returned or the parties concerned shall be notified.