In January of 2000, the National Archives completed its testing of Warren Commission Exhibit 567, which consists of nose portion of a bullet found in the limousine in which JFK was riding while assassinated. The fragment is accompanied by 4 pieces of organic material. The tests were conducted to determine the nature of the fibers adhering to the bullet and the nature of the accompanying organic material. This including DNA tests to see if the organic material could be identified as tissue from either President Kennedy or Texas Governor Connally. Laboratory tests were conducted by outside laboratories including that of the FBI and the Armed Forces Institute of Pathology.

Tests concluded that the fibrous material was not of textile origin, and thus could not be matched to the clothing of either man. The organic material was determined to be of human origin, but mitochondrial DNA tests were inconclusive.