When collecting and collecting evidence from relevant units and individuals, the public security organ shall inform them that they must provide evidence truthfully. Evidence involving state secrets, commercial secrets and personal privacy shall be kept confidential. Whoever forges, conceals or destroys evidence shall be investigated for legal responsibility according to law.
When the public security organ takes evidence from the relevant units and individuals, it shall be approved by the person in charge of the case-handling department and issue a notice of taking evidence. The transferred unit or individual shall stamp or sign the notice, and if it refuses to stamp or sign, the public security organ shall indicate it. When necessary, the content of evidence and the process of obtaining evidence shall be fixed by means of audio or video recording.
Legal basis: Article 210 of the Procedures for Handling Criminal Cases by Public Security Organs can ask the witness and the victim on the spot, or at the unit or residence where the witness and the victim are located, or at the place where the witness and the victim put forward. When necessary, witnesses and victims may be notified in writing, by telephone or on the spot to testify in public security organs.
The questioning of witnesses and victims should be conducted separately.
Investigators should produce people's police certificates when questioning witnesses and victims on the spot. Inquiries at the unit or residence of the witness or the victim or at the place proposed by the witness or the victim shall be approved by the person in charge of the case-handling department and a notice of inquiry shall be made. Before the inquiry, the investigators shall produce the inquiry notice and the people's police card.