How to prohibit irrelevant persons from entering a crime scene

To prevent unrelated persons from entering the crime scene, the following measures can be taken:

1. Set up an isolation zone to mark the scene as prohibited. You can put up isolation tape around the area, use clear signs to state that entry is prohibited, and send people to guard the entrance to ensure that unrelated people cannot enter the site.

2. Dispatch police to strengthen on-site control. Dispatch sufficient police force and adopt strict control measures to block the advancement of irrelevant personnel.

3. Restrict media interviews. For irrelevant media or excessive media, restrictions can be implemented to only retain the existence of necessary media to reduce on-site confusion and interference.

4. Strengthen on-site protection. The scene needs strict protection, and civil and physical defense measures can be taken to ensure that the crime scene is not damaged or polluted, and to ensure the smooth progress of investigation and evidence collection.

The above measures can effectively prohibit irrelevant personnel from entering the crime scene, protect the scene, and ensure the orderly conduct of the case investigation.