2018-05-12 23:58:22 UTC
The NATIONAL ACADEMY OF SCIENCE panel unanimously concluded that:
The acoustic analyses do not demonstrate that there was a grassy knoll
shot, and in particular there is no acoustic basis for the claim of 95%
probability of such a shot.
The acoustic impulses attributed to gunshots were recorded about one
minute after the President had been shot and the motorcade had been
instructed to go to the hospital.
Therefore, reliable acoustic data do not support a conclusion that
there was a second gunman.
Ramsey, Norman F.; Alvarez, Luis W.; Chernoff, Herman; Dicke, Robert H.;
Elkind, Jerome I.; Feggeler, John C.; Garwin, Richard L.; Horowitz, Paul;
Johnson, Alfred; Phinney, Robert A.; Rader, Charles; Sarles, F. Williams
(1982). Report of the Committee on Ballistic Acoustics (Report).
Washington, D.C.: National Academy Press. p. 2