Semantics - 'arrest' in its legal sense is a precise term. 'Crime
prevention' is an act that can be performed by any person, military or
civilian. For instance, are you just going to ignore something like a
mugger beating up a grandmother? Or, as in Florida, where two geezers
simultaneously offed an armed robber sticking up the restaurant and
interrupting their lunches. (They were sitting at different tables.)
Better make the correct decision, though.
Walt BJ