The Findings of the House Select Committee on Assassinations
The House Select Committee on Assassinations (HSCA) was an eleven-man committee created in 1976 amidst the aftermath of the Church and Pike Committees and intended to investigate “not only the assassination of Kennedy, but also that of Martin Luther King, Jr.”. In the HSCA’s final 1979 report, the Committee found that “scientific acoustical evidence established a high probability that two gunmen fired at President John f. Kennedy” while stipulating that additional “scientific evidence did not preclude the possibility of two gunmen firing at the President”.
To quote more simply from Encyclopædia Britannica, “a Dictabelt audio recording made from a Dallas motorcycle policeman’s microphone that was said to provide evidence of four shots—that is, three by Oswald and a fourth by another shooter. That fourth shot, a miss, was thought to have come from the grassy knoll. As a result of this acoustic evidence, the HSCA concluded that there had been two shooters and that the assassination was likely the product of a conspiracy”.
Interestingly, this was the only real delineation the HSCA’s final report made from the Warren Commission, which had investigated the Kennedy assassination and submitted their final report over a decade before. To quote from Encyclopædia Britannica, “…the HSCA’s findings were largely in line with those of the Warren Commission (including the conclusion that a shot by Oswald had killed the president and that a single bullet had hit both Kennedy and Connally)... The committee also concluded that neither any U.S. security or intelligence agencies (including the CIA) nor the government of Cuba or the Soviet Union had been involved. It did not rule out the involvement of organized crime or anti-Castro groups, but it could not prove it”.
For the most part, the HSCA made only one demarcation from the original Warren Commission and it came in their analysis and acceptance of the Dictabelt recording.
The Evidence for a Second Shooter
On November 22, 1963, the day Kennedy was killed, a dictabelt recording was made. For those younger readers who may be less attuned to such devices, a dictabelt was an analog audio recording device, which came about in the late 1940s and predominantly was used to take dictation.
Essentially, the dictabelt would use “a stylus to emboss a groove into flexible plastic belt, the groove being much like the groove in a phonograph record”. This video here explains the Dictabelt in far greater detail.
On the day in question, a Dictabelt recording was made of all radio traffic coming from Dallas Police Radio Channel 1, the ordinary radio channel used by the Dallas Police Department. Channel 2 was reserved for special events, which the presidential motorcade would be classified as and was recorded using a different audio device. The audio recording lasts for roughly five and a half minutes and begins at 12:20 pm, a minute before the assassination took place. The full audio can be found here.
According to Vincent Bugliosi in his mammoth book on the Kennedy assassination Reclaiming History, “…two acoustics experts from Queens College in New York, Mark Weiss and Ernest Aschkenasy [claimed] based on their mathematical computations and a static-filled Dallas police Dictabelt recording…they were able to discern, from “impulse sounds” and “echo pattern predictions,” that there was a “95 percent or better” probability that the fourth shot was fired from the grassy knoll, and hence, a conspiracy”.
This evidence for the HSCA to claim that Kennedy was assassinated by way of a conspiracy came from these audio recordings and these audio recordings alone. Prior to this, the Committee was effectively going to conclude that Lee Harvey Oswald had committed the act alone and even developed a draft of their final report. Four members of the Committee, Representatives Harold Saywer (R-MI), Robert Edgar (D-PA), Samuel Devine (R-OH), dissented to the final report with Sawyer even stating that the final report was based on “supposition upon supposition upon supposition”.
With this new evidence, the Committee entered into their report that President Kennedy was assassinated by way of a conspiracy. Today, the vast majority of Americans forget that the HSCA also affirmed that a single bullet struck both Governor Connally and the President, that Oswald had fired that round, that no signatory member of the U.S. Intelligence Community nor a Foreign Intelligence Entity (FIE) was involved in the assassination; the only thing that anyone takes away from the HSCA’s final report is that there was a conspiracy to kill the President.
For example, in one of the most notable (and historically inaccurate) films ever made, Oliver Stone’s 1991 picture JFK, a final title scroll reads, “A Congressional investigation from 1976-1979 found a “probable conspiracy” in the assassination of John F. Kennedy and recommended the Justice Department investigate further” while also detailing that the Department of Justice (DOJ) did not further investigate.
Most people remember the headlines, not the rest of the story. However, what gets left out of this story is the continued investigation of the Dictabelt recording by members of the U.S. government, news journalists, and scientific research based Non-Governmental Organizations (NGOs).
The Problems with the Conspiracy Claim
Almost immediately, the HSCA’s claim was met with sharp criticism from a wide array of fields and experts.
The DOJ, in spite of Stone’s JFK claiming otherwise, did investigate, commissioning a study from the National Academy of Science (NAS), a non-profit and NGO focusing on the advancement of various scientific fields in the United States. A panel of twelve physicists with a wide array of practical and academic experience in the fields of astrophysics, atomic physics, astronomy, and nuclear physics analyzed the audio recording and released their final report to the DOJ and the public in 1982.
Quoting from the NAS report, the twelve-man panel found unequivocally, “…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”.
In the succeeding decades, additional information has come out placing further doubt on the credibility of the Dictabelt recording.
As briefly mentioned before, one of the best books on the Kennedy assassination is Vincent Bugliosi’s work Reclaiming History, a 1,000+ page work that was an over twenty-year endeavor documenting the assassination, the Warren Commission investigation, and the many conspiracies that have arisen in the over fifty years since the event. Bugliosi mentions the Dictabelt at various points and, in many cases, interviews persons with extensive knowledge of the recording.
Bugliosi writes how the DOJ also conducted their own investigation into the audio, building off of the NAS’ report and, in 1988, disclosed to the U.S. Senate Committee on the Judiciary that they disagreed with the HSCA on the charge of a conspiracy. He also found that the FBI’s Technical Services Division completed their own report on the recording in 1980 and reached the conclusion that the Committee could not conclusively prove that the sounds heard on the recording were gunshots or even came from Dealey Plaza.
Bugliosi also interviewed the Dallas police officer who was allegedly driving the motorcycle from which the recording came from, H.B. McLain. McLain had testified to the Commission that his own radio had been stuck in the “on” position, allowing the audio to be recorded, yet had done so without listening to the audio in question.
Hearing the recording later, McLain informed Bugliosi that the recording’s movements did not match his own actions on November 22nd (McLain followed the presidential motorcade the entire time from Dealey Plaza to Parkland Hospital with sirens on the entire time while the recording appears to have sirens simply passing by). McLain also claimed that the motorcycle’s engine from the recording was from a three-wheeled motorcycle while he only ever drove a two-wheeled motorcycle.
Other discrepancies within the audio can be heard, such as noise from the crowd never being heard on the recording in spite of the fact that hundreds had come out to see Kennedy’s motorcade in Dallas and were making raucous noise throughout the procession.
In 2001, a rather important development occurred that, to some, seemed to vindicate the HSCA. Publishing in the peer-reviewed journal Science & Justice, Dr. Donald B. Thomas, an independent researcher of the Kennedy assassination and a research entomologist with the USDA’s Agriculture Research Service, claimed that the NAS study was flawed and that the HSCA’s original conclusion was in fact accurate. He writes, “The validity of acoustic evidence for a gunshot from the ‘Grassy Knoll’ was challenged on statistical grounds and on the basis of an anomaly on the Dallas police recordings. However, the assumptions underlying those criticisms were not in accord with evidence overlooked by the review panel. With a rigorous statistical analysis one arrives at a calculation for the probability that the recording contains a random pattern which by chance resembled the acoustic signature of a gunshot from the Grassy Knoll”.
This journal article prompted a re-investigation of the Dictabelt recording by various authorities and persons.
In 2003, multiple investigations were performed. Court TV commissioned an analysis by the signal analysis firm Sensimetrics, Inc. for a November episode of their program Forensic Files which “concluded that there is no valid evidence for gunshots on the Dallas Police Department (hereinafter DPD) recordings… the match between the suspect sound pattern on the DPD recording and a test shot fired from the grassy knoll, was no greater than expected to occur by chance”. After the episode premiered, Thomas wrote an article aiming to rebut the conclusions made by Sensimetrics and Court TV.
Also in 2003, Peter Jennings of ABC News, for the program Peter Jennings Reporting, analyzed the Dictabelt recording and came to the conclusion that the sounds recorded on the Dictabelt could not have come from Dealey Plaza and that H.B. McLain could not have been the originator of the recording as he had yet to enter the Plaza with the rest of the presidential motorcade. The reporting in this documentary also won the Edward R. Murrow Award for News Documentary in 2004.
Interestingly, some independent researchers have criticized both the NAS report and Thomas’ conclusions. Michael O’Dell, writing for The Kennedy Assassination blog in 2003 (the personal project of Associate Professor John Charles McAdams of Marquette University), concluded that the timeline both Thomas and the NAS relied upon was faulty while also finding that original claim of a “95 percent or better” probability that a shot came from the Grassy Knoll was logically unsound. In spite of this inaccuracy on the part of the NAS, O’Dell notes that, “Although the [NAS’] timeline is inaccurate, mostly due to the misunderstanding about the Audograph mechanics and missing the skips, the corrected timeline still supports their conclusionthat the impulses occurred after the shooting”.
Perhaps most significantly, many of the original investigators from the twelve-panel NAS report published their own article in response to Thomas’. In 2005, publishing in Science & Justice as well, five of the original twelve wrote, “We affirm the NRC conclusion “that the 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.” We also show that if, instead, the HOLD synchronization is ignored and the “YOU . . . Stemmons” synchronization is used, the first sounds alleged to be from shots occur at least 30 s after the assassination” while also noting that Thomas’ analysis utilized “erroneous parts of the Committee’s analysis of the Bowles recordings and combined it with an erroneous implicit assumption…”.
Despite this, debate still raged on. In 2013, Professor Larry J. Sabato, Director of the University of Virginia’s Center for Politics and a Professor of Politics, commissioned an analysis of the Dictabelt recording, coming nearly fifty years after the assassination.
Utilizing various improvements in acoustical analysis and digital methods, Sabato’s commissioned team from Sonalysts, Inc. came to the overall conclusion “The evidence obtained suggests that the motorcycle was not part of the motorcade and therefore was not in a position to record the sounds of gunfire”. Expanding upon this in their conclusion, the team states, “These data uniformly indicate that the motorcycle with the open microphone was not part of the motorcade. Therefore, it is unlikely that the motorcycle was in a position to record the sounds of gunfire. Based on these observations, we conclude that the Dictabelt recording is not applicable to the identification of assassination gunfire”.
Conclusion
The Dictabelt recording has been analyzed again and again and again. Repeatedly, it has been shown that the Dictabelt recording has been inaccurate and scientifically incapable of proving a conspiracy to assassinate President Kennedy. There are far too many inconsistencies for it to be utilized in any kind of argument. In fact, in 1986, there was a televised criminal trial put on by London Weekend Television in which Lee Harvey Oswald was tried for the murder of President Kennedy; Vincent Bugliosi played the role of the prosecutor (which would later inspire him to write the book Reclaiming History) and Wyoming based criminal defense attorney Gerry Spence representing Oswald.
Throughout the entire trial, Spence never once brought up the Dictabelt recording, as even he knew that utilizing this would damage his client’s case. This was even before the DOJ’s 1988 report in addition to the various scientific and investigative analyses performed with more advanced equipment in the 21st century. This to me is quite telling as Spence either knew the Texas jury would not be swayed by such evidence or would have no significant basis in having his client be freed.
To put it simply, the Dictabelt recording has been proven to have far too many inconsistencies for a criminal trial or for usage in determining the surrounding aspects of the assassination. Furthermore, even when combined with all of the additional forensic, documentary, eyewitness, and ballistic evidence the end result is the same; the only logically valid conclusion is that Lee Harvey Oswald, acting on his own, assassinated the President from the Texas Schoolbook Depository.
Various government commissions and committees, federal agencies, journalists, and historians have never been able to link a U.S. federal intelligence or law enforcement agency, the Italian-American mafia, the Johnson administration, Castro’s Cuba, the Soviet Union, or the U.S. Armed Forces to the assassination beyond circumstantial evidence. There has never been any conclusive, indisputable evidence put forth that shows a conspiracy or identifies another shooter or rifle used in the assassination.
The HSCA’s final report was written with the best of intentions, to examine the subject fully and try to either verify or refute the claims made by the Warren Commission. In the end, due to sensationalist and baselessly conspiratorial forces like Mark Lane, Oliver Stone, and L. Fletcher Prouty, the American public has gained a severely misinformed view of the assassination, which continues to cause problems for society and politics.
What do you think of the dictabelt recordings? Let us know below.
