If I were a policeman, I would definitely sum up different ways of handling cases according to different forms of cases. If it is a kidnapping case, we must first abide by a principle, that is, we must protect the hostages without hurting them. If a criminal suspect has any requirements, he should agree first. After the criminal suspect comes out, he should rescue the hostages in a short time and bring the suspect to justice. If the rescue fails, let the sniper be killed with one blow, and don't give him a chance to shoot. Then rescue the hostages.
If it is a murder case, don't destroy everything at the scene (just don't touch the items at the scene directly with your hands). Even if you want to touch them, you have to wear white gloves and shoe covers to enter the scene. ) Look for fingerprints carefully indoors, try not to move things that can't be moved indoors, and walk less if you can. While observing the scene, we should send people to look for witnesses (that is, people who saw the suspect or the neighbors of the deceased) and listen to the witnesses tell us what the suspect looks like, what is the relationship between the address and name of that person and the owner (that is, the deceased), what are the contradictions, and whether anyone owes anyone money. Let other policemen draw according to what the witness said. If there is surveillance video, be sure to watch it. When everything is known, we will arrest him.
If I were a policeman, I would do more. I will do many good things to make every family live a good life.