Congresswoman Luna was the subject of this Substack post, and you can instantly see a clue that she is not quite right.
Look at the book on the left side of her desk: Mortal Error: The Shot That Killed JFK by Bonar Menninger, published in 1992.

Menninger tells the story of Howard Donahue, a firearms expert, who believes that Oswald fired two shots (one missed and the other hit Kennedy and Connally) and that the fatal head shot was fired by George Hickey, a Secret Service agent in the follow-up car.
Vincent Bugliosi spends several pages in his book Reclaiming History debunking Donahue's theory: (pages 1734 - 1735 in the Kindle edition)
Even assuming for the sake of argument that the AR-15 was fired, Donahue’s assumption that with the possibility of the shot ending up in thousands of other places in Dealey Plaza (or Hickey’s own car or the air above), it just happened to hit Kennedy in the back of his head is more than hard to believe. But to compound the problem, after a quarter of a century of research, Donahue is unable to come up with any evidence at all that the AR-15 was even fired that day. There were nine other people riding in or on the running boards of the presidential follow-up car, each of whom testified before the Warren Commission or gave a statement, and not one of them, including Agent Glen Bennett, who was seated within a foot or two of Hickey, said the AR-15 rifle or any other weapon was fired in the car around the time of the assassination. How is it possible that none of them heard the rifle being fired right next to them if it had indeed been fired? As Kennedy aide Dave Powers, who was in Hickey’s car, put it, “Someone a foot away from me or two feet away from me couldn’t fire the gun without me hearing it.”
And among the several hundred or so people in Dealey Plaza that day, not one said they saw or heard any weapon being fired inside the subject vehicle, or anywhere close to it. Indeed, Dealey Plaza witness Hugh Betzner Jr., in a November 14, 1967, letter to assassination researcher Richard E. Sprague, specifically said that he saw the rifle in Hickey’s hands and “it was not fired.”*
He concluded that this is "a story unfit for human consumption," and that "other than Howard Donahue and his biographer Bonar Menninger, I know of no serious student of the assassination who takes the book or its contents seriously." (page 1739 in the Kindle edition)
And Congresswoman Luna has a favorite documentary:
When I asked Luna which JFK assassination documentary she found most compelling, she named What the Doctors Saw. I highly recommend it; I watched it when it first came out. It offers startling medical insights into JFK’s wounds, as seven Parkland Hospital ER doctors reunite to discuss a day they will never forget.
This probably explains why she is so keen on getting the doctors who are still alive to testify before her sub-committee.
I hope she doesn't watch The Men Who Killed Kennedy. She might just call Judyth to be a witness.
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She actually wants members of the Warren Commission who are still alive to testify.