In the late '60s, Dallas had what I think the news media called the "shotgun squads". An officer, with a shotgun, would spend the evening in the back room of a convenience store, watching through a one way mirror, prepared to shoot anyone who tried to rob the store. And a number of hijackers were killed. I spent a number of evenings on that duty myself, including a couple of nights in a store in which 2 hijackers had been killed by officers. Fortunately, no store that I was sitting in was robbed while I was there. But the best I can remember, NO ONE in the news media, or elsewhere, objected to the killing of robbers.