Testifying before the House Judiciary Committee Wednesday, FBI Director James Comey revealed it wasn't the FBI that granted longtime Clinton aide and attorney Cheryl Mills immunity during the criminal investigation of Secretary Clinton's private email server. Instead, it was granted by prosecutors at the Department of Justice. "Who authorized granting Cheryl Mills immunity?" Rep. John Sensenbrenner asked. "It's a decision made by the Department of Justice, I don't know at what level inside," Comey responded. "In our investigations, any kind of immunity comes from the prosecutors, not the investigators."