From:
United States Court of Appeals for the District of Columbia Circuit
FINAL REPORT OF THE INDEPENDENT COUNCIL FOR IRAN/CONTRA MATTERS
Lawrence E. Walsh, Independent Council, August 4, 1993, Washington D.C.
Volume 1: Investigations and Prosecusions
Part II: History of the Investigation
Phase III: NSC Principals
The Investigation is Closed and Reopened: The Bush Diary
...On December 11, 1992, the White House unexpectedly informed Independent Counsel that President Bush had not produced to the investigation previously requested diaries relevant to Iran/contra. The review of Bush's diary notes, and the circumstances surrounding his failure to produce them earlier, required the investigation to re-open.
snip - During late December and January 1993 the diaries were produced. They did not justify re-opening the investigation. Independent Counsel's efforts to requestion President Bush about Iran/contra matters were thwarted by Bush's insistence that the questioning be limited to the subject of his failure to produce his previously requested diaries. This limitation was unacceptable to OIC, which over the course of its continuing investigation had gathered significant new evidence about which it wanted to question Bush.
snip -Independent Counsel's decision to pursue the investigation beyond the Poindexter trial resulted in these major findings:
that there was extensive knowledge of North's contra-support activities by high-ranking officials in the CIA, State and Defense departments;
that false testimony was given to and highly relevant documents were withheld from the congressional and criminal Iran/contra investigations, despite representations of cooperation by the Reagan and Bush Administrations;
that, contrary to their testimony, Bush, Shultz and Weinberger were kept informed of the details of the Iran arms sales; and
that senior Administration officials in November 1986 were being invited to conceal President Reagan's involvement in the November 1985 HAWK missile shipment to Iran by Attorney General Meese who believed that it was possibly illegal.
http://www.afn.org/~dks/i-c/pII-investigation-history.html#pII.1