Do you know what the police do to people when these people take someone by force and keep them in a location where they don't want to be (kidnapping)? They take

Do you know what the police do to people when these people take someone by force and keep them in a location where they don't want to be (kidnapping)? They take those people by force and keep them in a location they don't want to be. And do you know what they do when a person kills other people?