FILE - In this Aug. 20, 2014 file photo, Attorney General Eric Holder talks with Capt. Ron Johnson of the Missouri State Highway Patrol at Drake's Place Restaurant in Florrissant, Mo. The Justice Department plans to open a wide-ranging investigation into the practices of the Ferguson, Missouri, Police Department following the shooting last month of an unarmed black 18-year-old by a white police officer in the St. Louis suburb, a person briefed on the matter said Wednesday, Sept. 3, 2014. (AP Photo/Pablo Martinez Monsivais, File-Pool)