--- title: "Congress Concluded There Were Two Gunmen. It Has Never Withdrawn It." dek: "The finding of probable conspiracy is still on the books, forty-seven years on. It rests on a police recording, and the recording was undone by one sentence a drummer heard on a free magazine record." kind: investigation (Investigation) desk: The Republic author: June Halloway and Nadia Ferreira-Ost (fictional) published: 2026-08-09T21:00:00Z url: https://theyburied.com/article/dictabelt-crosstalk-timing tags: Dallas 1963, acoustics, House Select Committee, dictabelt, crosstalk genre: satire status: fiction — nothing in this story happened; every person, source and document is invented --- # Congress Concluded There Were Two Gunmen. It Has Never Withdrawn It. *The finding of probable conspiracy is still on the books, forty-seven years on. It rests on a police recording, and the recording was undone by one sentence a drummer heard on a free magazine record.* The United States House of Representatives concluded, in a report it published in 1979, that President Kennedy was probably assassinated as the result of a conspiracy. That is not a claim. That is a citation. No committee has reconvened to say otherwise. No successor body has superseded it. It sits in the record where it was put, and the thing it rests on is a scratched belt of plastic from a police radio room. > **Figure:** How an official finding of conspiracy was made, unmade, and left standing — see https://theyburied.com/article/dictabelt-crosstalk-timing ## What the recording is On the afternoon of 22 November 1963 a transmit button on one Dallas police motorcycle stuck open. For about five and a half minutes, the channel it was on could carry nothing else. Everything the microphone heard — engine, wind, road, whatever else — was cut into a dictabelt at headquarters, which is what police departments used before tape. Nobody thought about it for fifteen years. ## What the engineers did with it In 1978 the House committee hired acoustic engineers, who found six impulse patterns on the belt and went to Dallas to test them. They did it the direct way. They fired rifles in the plaza from candidate positions, recorded the echoes off the buildings, and compared those echo signatures to the patterns on the belt. Two physicists then modelled the echoes rather than shooting them, refined the match, and reported that one impulse pattern had about a 95 per cent probability of being a shot from the fence on the knoll. The committee published in January 1979. The acoustics were the load-bearing part of the finding, and the committee said so. ## The drummer Later that year the recording was pressed onto a floppy plastic disc and bound into a men's magazine as a giveaway. An amateur drummer bought it and played it over and over, which is what drummers do to recordings, and heard something under the impulses that nobody in the investigation had reported: a voice. The voice is a sheriff giving an instruction about securing the scene. That instruction was given roughly a minute after the shooting. If it is under the impulses, the impulses are in the wrong minute. > An impulse is a sudden pressure change and a great many things make one. A backfire makes one. A dropped clipboard makes one. A rifle makes one. > > — Dr. Aurelio Danforth-Mbaye ## The panel A national scientific panel reviewed the whole thing in 1982 and agreed with the drummer. Its report is not a document about the assassination. It is a document about timing, and it concludes that the impulses occurred about a minute after the shots, and that whatever they are, they are not the shots. That is where most accounts stop, and it is where most accounts of the other kind stop too — one side finishes at 1979 and the other finishes at 1982, and the two sides have been finishing in different years for four decades. ## It came back In 2001 a paper in a peer-reviewed forensic journal argued that the crosstalk had been mistimed and that the impulses stand. In 2005 a rebuttal argued the reverse. It has continued in that register ever since: careful people, in print, with working shown, disagreeing. This newspaper reports that as the state of the question, because it is the state of the question. ## What we did We did not want to argue about audio we had only heard fourth-hand. So we bought a first-generation transfer, and we gave it to an acoustic engineer who had never worked on this case, with a commissioning letter that said nothing about what it was. We asked him one question. How far apart are the impulses and the sheriff's voice? His answer is closer than the 1982 panel said and further apart than the 2001 paper said. It supports nobody. His full statement runs at the foot of this story and contains the most useful paragraph we have printed this year, about what a probability is a probability *of*. ## The thing we could not close The acoustic case needs a specific microphone in a specific place. For it to work, that motorcycle has to be in the plaza, roughly where the model puts it. Several officers have been proposed over the years. None has ever been established. One of them said, on the record, that he was not there. Our correspondent asked the archivist whether the dispatch logs could settle it. They cannot. The logs record who was assigned, not where a man's front wheel was at half past twelve. ## Where that leaves the record An official finding of probable conspiracy, standing, unwithdrawn, and load-bearing on evidence that the government's own review panel said was in the wrong minute. Both halves of that sentence are true and they have been true together since 1982. This newspaper's view is that the interesting fact here is administrative rather than acoustic. A conclusion entered the permanent record of a legislature, the basis for it fell apart three years later in a different institution, and there is no mechanism by which the second event edits the first. Nobody buried anything. The filing system simply does not have a rubber stamp that says *never mind*. ## Sources (invented) - The committee's published report and hearing volumes, Public record — Read in the original, including the acoustics volume and the dissents (2026) - The national panel's 1982 report, Public record — Read in full, including the appendices nobody quotes (2026) - Dr. Aurelio Danforth-Mbaye, Acoustic engineer, retained by this newspaper; no prior work on this case — Given the transfer with no context and asked to time the crosstalk against the impulses (April–June 2026) - Wilhelmina Oyaro-Petrakis, Archivist, Dallas municipal records — Interviewed in person; pulled the dispatch logs for the relevant afternoon (March 2026) - A first-generation transfer of the channel-one belt, Commissioned by this newspaper — Paid for; the audio and the transfer notes are published with this story (February 2026) ## Documents cited (invented) - PX-2059: https://theyburied.com/vault/PX-2059 ## What we could not confirm - Whether the impulses are gunfire. This is the whole question and it has been argued in peer-reviewed print for a quarter of a century by people better qualified than anyone at this newspaper. We have not settled it and do not claim to. - Where the motorcycle was. The acoustic case requires a specific microphone in a specific place. Several officers have been proposed. None has ever been established, and one of them said flatly he was not there. - Our own re-timing. Our engineer puts the crosstalk closer to the impulses than the 1982 panel did and further from them than the 2001 paper did, which is a result that pleases nobody and is printed for that reason. ## Right of reply **Dr. Aurelio Danforth-Mbaye, the engineer we retained** (Asked to reply at length rather than be quoted in fragments. Printed unedited.): > I took this job because your commissioning letter did not tell me what it was about, and I want to be honest that I worked out what it was about within an hour and finished it anyway. > > Here is what I can tell you and here is what I cannot. > > I can tell you that there are impulse events on that belt and that they are real events and not damage to the medium. I can tell you that there is speech underneath them. I can tell you, to a tolerance I have published, how far apart those two things are. > > I cannot tell you what made the impulses. Nobody can tell you that from this recording. An impulse is a sudden pressure change and a great many things make one. A backfire makes one. A dropped clipboard makes one. A rifle makes one. > > The reason this argument has run for forty-seven years is not that people are stupid or dishonest. It is that the recording is a bad recording of an unknown thing made by an unknown machine in an unknown place, and every step of the reasoning has to assume something. > > What I would say to your readers is this. When a scientist gives you a probability like ninety-five per cent, ask what it is a probability of. In that paper it is not the probability that a shot was fired from the knoll. It is the probability that a particular echo pattern would arise by chance. Those are different sentences and only one of them is a finding about the world. --- They Buried is a satirical newspaper. Every story, source, document and person in it is invented. It reports from a fictional world in which the conspiracy theories are true, with the method of a real daily.