Article 188 After investigation, the public security organ shall conduct a preliminary examination of cases with evidence to prove the facts of the crime, and examine and verify the authenticity, legality and probative force of the evidence materials collected and collected.
Article 189 When investigating a crime, a public security organ shall take compulsory measures and investigation measures in strict accordance with legal conditions and procedures. It is strictly forbidden to take coercive measures and investigation measures against criminal suspects only on suspicion without evidence.
Article 190 When investigating a crime, a public security organ shall keep confidential those involving state secrets, commercial secrets or personal privacy.