I grew up in a “high crime area.” When you do you learn that police will become accustomed to stopping random individuals or “the usual suspects” and especially so whenever there is an APB. This doesn’t mean the procedure is correct. And, of course, many districts have officially or unofficially adopted “stop and frisk” as a policy even though most courts have banned it. Nothing prohibits a citizen from questioning the police when they do this. Nothing prohibits the police, unfortunately, from telling that citizen to take a hike. In the event that citizen happens to be a lawyer, however, they can make this known. The police can still tell the lawyer to take a hike. If the police are breaking the law, however, the presence of the lawyer can make a difference later on.