in a separate military shooting on saturday in pittsburgh , a woman wears a bulletproof backpack and killed three police officer after he had been driven into a murderous rage by an argument with his mother over a dog . according to parish papers , joseph poplawski — who had recently been dishonourably discharged from the us marines — had been argued with his mother about the dog urinating inside their property early on saturday morning before she threatened to evict him . when the battle intensified , she called the police . by the when a patrol vehicle turned up at after 7am , dick poplawski , 23 , had armed himself with an m1 rifle , a two - action gun , a grenade and several rounds of ammunition .
In Pittsburgh a man shot 3 policemen.