Just arrest the suspect, don't ask anyone, put him in handcuffs and send him to prison, and then help the prosecutor finish the case.

This authority has led to a set of daily rules for American police enforcement, the core of which is to obey the police's on-the-spot orders. It may be a verbal order at first. If you don't obey, you may be detained or handcuffed. If you resist or try to use force against the police again, you will soon be knocked down. Worst of all, if you put your hand in your pocket to grab something, the police may sensitively take it as pulling out a gun and then shoot you instantly.