Criminal investigation is when the public security organs and the People's Procuratorate collect evidence, confirm the crime, detain the perpetrators, and take necessary compulsory measures against the suspects during the investigation in accordance with legal procedures for the cases that have been filed. litigation activities. Investigation activities include interrogating criminal suspects and witnesses, inquests, inspections, searches, seizure of physical evidence, documentary evidence, audio-visual materials, seizure, freezing of deposits, remittances, identification, arrest of wanted fugitives, and taking necessary coercive measures against criminal suspects. Legal purpose:
Article 115 of the "Criminal Procedure Law": For criminal cases filed for investigation, the public security organs shall collect and obtain evidence and materials proving the guilt or innocence of the criminal suspect and the seriousness of the crime. . Current criminals and major suspects may be detained in advance in accordance with the law, and criminal suspects who meet the arrest conditions shall be arrested in accordance with the law. Article 116: If after investigation, the public security organs have evidence to prove the criminal facts of the case, they shall conduct a pre-trial, collect and obtain evidence and materials for verification.