The circumstances that require witnesses to take investigation measures include: when making an inquest or checking the scene, it is necessary to make a record and sign it by the witness; When searching the scene, there should be witnesses of the searched person or his family, and so on.

What witnesses are needed for investigation measures?

According to the relevant provisions of the Criminal Procedure Law, witnesses or professionals outside the case should be present on the following occasions.

1, when interrogating deaf people.

Article 119 When interrogating a deaf-mute criminal suspect, people familiar with deaf-mute gestures should participate, and this situation should be clearly recorded.

2. When dissecting a corpse with unknown cause of death

Article 129 The public security organ has the right to decide to conduct an autopsy on a corpse with unknown cause of death and notify the family members of the deceased to be present.

3, the inquest and inspection.

Article 131 An inquest or inspection shall be written in a written record, which shall be signed or sealed by the participants and witnesses.

4. When searching

Article 137 During a search, the person being searched or his family members, neighbors or other witnesses shall be present.

Article 138

The search shall be written in a record, which shall be signed or sealed by the investigator and the searched person or his family members, neighbors or other witnesses. If the searched person or his family is at large or refuses to sign or seal, it shall be indicated in the record.

5, seizure, seizure of physical evidence and documentary evidence

Article 140

The seized or detained property and documents shall be checked clearly with the witnesses present and the holders of the seized or detained property and documents, and a list shall be made on the spot in duplicate, which shall be signed or sealed by the investigators, witnesses and holders, one for the holder and one for future reference.

Step 6 identify

There is no special stipulation in the Criminal Procedure Law. In actual investigation, in order to find out the case, investigators can let the victim, criminal suspect and witness identify the articles, documents, bodies, places or criminal suspects related to the crime. The identification shall be presided over by investigators, and the investigators shall preside over the identification.

There shall be no less than two investigators. When identifying a criminal suspect, the appraiser is unwilling to do it publicly, and the investigator can do it without exposing the appraiser and keep it confidential. To appraise the process and results, an appraisal record shall be made, which shall be signed by the investigators and signed or sealed by the appraisers and witnesses.

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Investigation measures need witnesses, not to say that you can search if you want. Therefore, witnesses should participate in the search process and need their signatures or seals when necessary. In the actual investigation and identification, investigators need the signature and seal of witnesses.