Earlier quoted context omitted.
That was a wild read. > Q. Suppose the thief was apparently unarmed but was running away? > A. Call halt twice at the top of your voice, and if he does not halt, fire one warning shot; and if he does not obey this, shoot to hit him. There was no chill during the great depression: > Q. If I hear the command 'Hands Up,' am I justified in obeying this order? > A. No; fall to the ground and start shooting.
Asides from all that stuff about ordering soldiers to kill American civilians, I'm just boggled that it had a FAQ. How old is the FAQ structure? Wikipedia suggests a history going back to the 1600s, and much further if you stretch the definition to Plato.
There's no reason that killing armed gangsters wasn't totally justified in this case.