A case was filed and people were arrested later. According to the "Procedural Regulations for the Handling of Criminal Cases by Public Security Organs": Article 187 The public security organs shall conduct timely investigations into criminal cases that have been filed, and comprehensively and objectively collect and obtain information on whether the criminal suspect is guilty or innocent, and whether the suspect is guilty or not. Evidence of minor or serious crimes. Article 188: After investigation, the public security organs shall conduct a preliminary review of cases where there is evidence to prove the facts of a crime, and review and verify the authenticity, legality and probative force of the evidence and materials collected and obtained. Article 189 When investigating crimes, public security organs shall take coercive and investigative measures in strict accordance with the conditions and procedures prescribed by law. It is strictly prohibited to take coercive and investigative measures against criminal suspects based solely on suspicion without evidence. .