The Justice Department has withdrawn subpoenas issued in the investigation of former CIA Director John Brennan, with officials asking for voluntary interviews instead of testimony before a grand jury. That's according to two people familiar with the matter. A small handful of subpoenas were known to have been issued over the weekend for witnesses to appear before a grand jury in Washington. But investigators on Monday evening informed lawyers that the subpoenas were being withdrawn in favor of requests for voluntary interviews, said the people, who spoke on condition of anonymity to The Associated Press to discuss developments in an ongoing investigation.