FILE - In this July 17, 2020, file photo the federal prison complex in Terre Haute, Ind., is shown. The killing of an inmate who was beaten to death at a federal lockup in Indiana is under investigation by the FBI, according to documents obtained by The Associated Press, Tuesday, Aug. 25, 2020, about an attack that revives questions about safety in the beleaguered federal prison system.(AP Photo/Michael Conroy, File)