Agents detained Anthony Smith, a social studies teacher and one of the organizers of the Philadelphia Coalition for Racial Economic and Legal Justice (Philly for REAL Justice), at his home Wednesday morning, his attorney Paul Hetznecker said. His arrest came just days after he was lauded in an article in Philadelphia Magazine for his activism. U.S. Attorney William M. McSwain has scheduled a news conference Thursday to announce the indictments on charges related to “police vehicle arsons.” Sources familiar with the investigation said it is tied to the unrest that roiled the city in May after the police killing of...