in a separate military killings on saturday in oakland , a guy masks a bulletproof vest and killed three policemen policemen after he had been driven into a murderous mob by an arrest with his mother over a car . prior to court papers , richard poplawski — 14 had newly been dishonourably discharged from the us marines — had been arguing with his mother about the dog urinating behind their home early on saturday morning when she threatened to evicted him . when the argument escalated , she fought the police . by the timer a cops car turned up at after 7am , mr poplawski , 23 , had armed himself with an automatic pistol , a long - neck rifle , a pistol and several rounds of munitions .
In Pittsburgh a man shot 3 policemen.