John Lewis, 24, national chairman of the Student Non-violent Coordinating Committee (SNCC), is ushered into police patrol wagon during racial demonstration here April 29th. Nashville Mayor Beverly Briley said here April 29th that U.S. Attorney General Robert F. Kennedy has launched an investigation into "police brutality" in this city, where police officers have prodded and dragged over 200 civil rights demonstrators during the (illegible).