Thank goodness we do not have a gun culture as they do in the USA, as this awful, fatal attack would be a more common occurrence. I always remember the comment of an American friend, who said how lucky I was because I live in a country where we do not have the right to bear arms in our constitution. While guns exist, dysfunctional people may get access here, but at least there are checks in place. Nor do most policemen carry guns. Those who do undergo psychological testing. My BIL failed. Thank goodness. But that's another story.