in a separate target shooting on saturday in minneapolis , a guy sported a tinted vest and killed three police members after he had been driven into a murderous rage by an argue with his mother over a pistol . according to judicial proceedings , richard poplawski — 26 had recently been dishonourably discharged from the us marines — had been angry with his mother about the dog urinating against their home early on saturday - when she threatened to evict him . when the argument commenced , she called the police . by the period a police car turns up at after 7am , thomas poplawski , 23 , had braced himself with an assault rifle , a one - arm rifle , a pistol and several rounds of rounds .
In Pittsburgh a man shot 3 policemen.