I heard that the American police have great power to shoot people who don't obey the inspection, right?

The American police do have a lot of power in law enforcement, but there are still strict rules about shooting, not to say that they can do whatever they want.

To put it simply, don't let the police think that you are obstructing and threatening his law enforcement and personal safety, so generally speaking, even if you don't obey, at most, you will be arrested and walked around in prison.

In America, when the police enforce the law, they should obey. If you have any questions, go directly to the judge, and don't argue with the police on the spot.