In this case the question came from a young person, and they can be forgiven the crudity of their curiosity, even if it is backloaded with tired assumptions force fed by bad television, video games, abysmal schools, and that grandest of American traditions:  the full criminal embrace.  While the characterization of cops has migrated from the Officer Friendly types on Adam 12 to masked bogeymen in “tanks” fiendishly no-knocking the wrong house, outlaws and very bad people enjoy the fruits of selective judgment.