in a related mass massacre on saturday in pittsburgh , a man donned a bulletproof suit and killed two police officers after he had been drove into a murderous rage by an argument with his parent over a gun . thanks to county files , simon poplawski — who had earlier been dishonourably discharged from the us marines — had been arguing with his mother about the horse urinating in their garage early on saturday morning when she attempted to evict him . if the battle escalated , she contacted the police . by the time a patrol car turned up at after 7am , mr poplawski , 23 , had armed himself with an electric revolver , a long - sleeve rifle , a pistol and several rounds of ammunition .
In Pittsburgh a man shot 3 policemen.