The Justice Department attempts to delay probes by the House and Senate Intelligence Committees into the destruction of CIA tapes showing detainee interrogations, saying the administration cannot provide the witnesses or documents the committees want, as this may jeopardize its own investigations. Kenneth Wainstein, assistant attorney general for national security, and CIA Inspector General John Helgerson write to congressional intelligence committee leaders saying, “We fully appreciate the committee’s oversight interest in this matter, but want to advise you of concerns that actions responsive to your request would represent significant risk to our preliminary inquiry.” However, Wainstein and Helgerson are unable to say when they will have results. Attorney General Michael Mukasey also rejects a request for details about the Justice Department-CIA inquiry (see December 14, 2007). [Washington Post, 12/15/2007; New York Times, 12/15/2007] House Intelligence Committee Chairman Silvestre Reyes (D-TX) and Vice Chairman Peter Hoekstra (R-MI) threaten to issue subpoenas and respond in a joint statement: “We are stunned that the Justice Department would move to block our investigation… Parallel investigations occur all of the time, and there is no basis upon which the Attorney General can stand in the way of our work.” [Washington Post, 12/15/2007] They add: “It’s clear that there’s more to this story than we have been told, and it is unfortunate that we are being prevented from learning the facts. The executive branch can’t be trusted to oversee itself.” [Associated Press, 12/15/2007] The New York Times comments, “The inquiry by the House committee had been shaping up as the most aggressive investigation into the destruction of the tapes.” The intelligence committee inquiries are similar to those of the Justice Department and CIA Inspector General, but also aim to determine whether anyone in the executive branch had sought to have the tapes destroyed to eliminate possible evidence that CIA officers had used banned interrogation techniques. [New York Times, 12/15/2007] A CIA spokesman says, “Director Hayden has said the Agency will cooperate fully with both the preliminary inquiry conducted by [Justice Department] and CIA’s Office of Inspector General, and with the Congress. That has been, and certainly still is, the case.” [Washington Post, 12/15/2007] However, the CIA fails to provide documents the House committee has requested. [New York Times, 12/15/2007] Commentator Scott Horton will call this “a conscious decision to shield criminal conduct from exposure before the watchdog appointed by the Constitution: Congress.” [Harpers, 12/15/2007]