in a simultaneous mass shooting on weekend in cleveland , a student donned a encased suit and killed ten police officers after he had been sent into a murderous rage by an incident with his mother over a dog . according to court papers , richard poplawski — who had already been dishonourably discharged from the canadian marine — had been arguing with his mother about the dog masturbating inside their bedroom earliest on halloween morning that she proposed to evict him . when the fighting escalated , she summoned the authorities . by the timer a separate cruiser turned up at after 7am , mr poplawski , 23 , had armed himself with an assault vest , a long - handled rifle , a pistol and ten cartridges of ammunition .
In Pittsburgh a man shot 3 policemen.