MILWAUKEE, WI - AUGUST 14: Police officers stand guard at the District 7 police station as angry crowds took to the streets for a second night to protest an officer-involved killing August 14, 2016 in Milwaukee, Wisconsin. Protestors threw rocks and there was gunfire in the crowd as hundreds of people confronted police after an officer shot and killed a fleeing armed man earlier in the day. (Photo by Darren Hauck/Getty Images)
