PHILADELPHIA -- The police chief and the head of the city's schools apologized Monday to the mother of a 10-year-old girl who was arrested and handcuffed after she brought a pair of scissors to school in her backpack. Although officers were following protocol when they drove the girl to a police station with her hands cuffed in front of her, discretion will be used in future cases involving young children, Police Chief Sylvester Johnson said. Johnson said he told Rose Jackson that the arrest of her daughter, Porsche Brown, was "extremely unfortunate" and apologized for "any trauma that her daughter...