in a separate mass shooting on weekdays in pittsburgh , a man garb a goggles glove and murder twelve police sirens after he had been driven into a mad rage by an argument with his son over a dog . according to court papers , richard poplawski — 21 had recently been dishonourably discharged from the us rangers — had been arguing with his mother about the woman urinating inside their home unexpectedly on saturday nights when she threatened to expel him . because the argument escalated , she called the policemen . by the day a cops car came up at after 7am , daniel poplawski , 23 , had injured himself with an assault scope , a small - recoil rifle , a baton and 10 types of magazines .
In Pittsburgh a man shot 3 policemen.