in Dealey Plaza (crowd noises can be heard on at least ten channel-2 transmissions from the motorcade). Someone is heard whistling a tune about a minute after the assassination. No one actually heard gunshots on the recording. The only evidence that HSCA had for a second shooter was the Dictabelt sound recording. Four of the twelve HSCA members dissented to the HSCA's conclusion of conspiracy based on the acoustic findings, and a fifth thought a further study of the acoustic evidence was "necessary". Dissenting members of the committee included Congressmen Samuel L. Devine, Robert W. Edgar, and Harold S. Sawyer. Responding to a question asking how he would handle the Committee's report if he were at the Justice Department, Sawyer replied: "I'd file it in a circular file." Criticism Richard E. Sprague, an expert on photographic evidence of the assassination and a consultant to the HSCA, noted that the amateur film the HSCA relied on showed that there was no motorcycle between those riding alongside the rear of the presidential limousine and H.B. McLain's motorcycle, and that other films showed McLain's motorcycle was actually 250 feet behind the presidential limousine when the first shot was fired, not 120 to 138 feet. There was also no motorcycle anywhere near the target area. Adult magazine Gallery published a pull-out laminated cardboard recording (like those on the back of Cereal boxes) of the Dictabelt recording in its July 1979 issue. Assassination researcher Steve Barber repeatedly listened to that recording and heard the words "Hold everything secure until the homicide and other investigators can get there" at the point where the HSCA had concluded the assassination shots were recorded. However, those words were spoken by Sheriff Bill Decker about 90 seconds after the assassination, so the shots could not be when the HSCA claimed. The FBI's Technical Services Division studied the acoustical data and issued a report on December 1, 1980 (dated November 19, 1980). The FBI report concluded that the HSCA failed to prove that there were gunshots on the recording and also failed to prove that the recording was made in Dealey Plaza. In fact, using the techniques of the previous investigators, the FBI matched a gunshot recorded in Greensboro, NC in 1979 with the sound that was supposedly a shot from the grassy knoll – purportedly suggesting that the initial investigation's methods were invalid. National Academy of Sciences After the FBI