Crime prevention means access to healthcare, education, music & arts programs, fair housing, career opportunities, equal justice ...
Nothing wrong with reasonable stop & frisk. Must be able to articulate a reasonable suspicion that the subject was, is, or is about to commit a crime. It can't be he looks the part, is a black male of average height wearing a knit cap, was behaving in a suspicious manner, appeared nervous, obstructed justice by refusing to provide an ID, is probably guilty of something, disrespected a police officer, disobeyed orders, and so on.