
In this regard, a whistleblower named Dennis Montgomery, a former NSA/CIA contractor, came forward to FBI Director Comey with 47 hard drives and over 600 million pages of largely classified information, under grants of use and derivative use immunity, which I obtained for him with the U.S Attorney for the District of Columbia. Later, Montgomery, who suffers from a potentially fatal brain aneurism, testified under oath, for over 2-and-a-half hours before FBI Special Agents Walter Giardina and William Barnett in a secure room at the FBI’s field office in Washington, D.C. The testimony was under oath and videotaped and I have reminded the FBI recently to preserve this evidence.