I can think of one

Paul Soglin, in crticizing Sheriff David Clarke's plan to shift department resources to the parks and lakefront in an effort to maintain order, makes the following assertion:

There is not one city in the United States where the tide of violence and street crime was turned back by brute force and more police. None. Nada. Zippo. Zero. Zilch.

"Brute force" is his own hyperbole, but I can think of one city where stuff like that did stem the tide of violence and street crime. Maybe Paul has heard of it. It's called New York.