Filing a case refers to the litigation activities that the public security, judicial organs and other administrative law enforcement organs decide to investigate or try as a criminal case after reviewing the materials such as reporting, accusation, report, surrender and private prosecution according to their respective jurisdictions, and when they think that criminal facts have occurred and need to be investigated for criminal responsibility. Picking up the lost property refers to finding and actually possessing the lost property, which is a combination of discovery and possession. Picking up the lost property is a factual act, and it doesn't matter whether the picker has the capacity or not. If the person who finds the money refuses to return it, he is suspected of embezzlement and can then file a case.
legal ground
Article 14 of the Procedures for Handling Criminal Cases by Public Security Organs stipulates that criminal cases shall be under the jurisdiction of public security organs in accordance with the provisions of the Criminal Procedure Law, with the exception of the following criminal cases: (1) Crimes of corruption and bribery, crimes of dereliction of duty by state functionaries, crimes of illegal detention, extorting confessions by torture, retaliation and frame-up, illegal search, crimes of infringing citizens' personal rights committed by state functionaries by taking advantage of their functions and powers and other major crimes. (2) Cases of private prosecution, but if the people's court directly accepts a minor criminal case with evidence to prove the victim and rejects the prosecution because of insufficient evidence, and the people's court transfers it to the public security organ or the victim complains to the public security organ, the public security organ shall accept it; If the victim directly complains to the public security organ, the public security organ shall accept it; (3) Crimes committed by soldiers in violation of their duties and criminal cases within the army; (4) Criminal cases in which criminals commit crimes in prisons; (5) Other criminal cases that should be under the jurisdiction of other organs according to laws and regulations.