The Kennedy autopsy photographs and X-rays were never part of the Warren Commission records and were deeded separately to the National Archives by the Kennedy family in 1966 under restricted conditions.
Several pieces of evidence and documentation are described to have been lost, cleaned, or missing from the original chain of evidence (e.g., limousine cleaned out on November 24, Connally's clothing cleaned and pressed, Oswald's military intelligence file destroyed in 1973, Connally's Stetson hat and shirt sleeve gold cufflink missing).
Jackie Kennedy's blood-splattered pink and navy Chanel suit that she wore on the day of the assassination is in climate controlled storage in the National Archives. Jackie wore the suit for the remainder of the day, stating "I want them to see what they have done to Jack" when asked aboard Air Force One to change into another outfit. Not included in the National Archives are the white gloves and pink pillbox hat she was wearing.
The Assassination Records Review Board was not commissioned to make any findings or conclusions. Its purpose was to release documents to the public in order to allow the public to draw its own conclusions. From 1992 until 1998, the Assassination Records Review Board gathered and unsealed about 60,000 documents, consisting of over 4 million pages. All remaining documents are to be released by 2017.