This man shown below on the left with Earl Warren: Norman Redlich. Redlich wrote the first six chapters including the description of the shooting. He was also one of the key figures in the single bullet theory; he was one among several of the staffers who came up with the theory simultaneously. Without Redlich's tireless work - he would spend 18+ hours on the job - the report probably wouldn't haven been produced. Not in the form it was. He was essential to its creation and was in charge of a sort of "clearinghouse" for all of the information that the staffers of the commission compiled. It ran through his desk, he read it and signed off on it.
Redlich was a strong liberal/leftist and a fierce critic of Joe McCarthy. He represented several people called before the HUAC hearings as well as McCarthy's hearings and he denounced McCarthy for the demagogue that he was. Redlich was against the execution of the Rosenbergs (he was a life long opponent of the death penalty). He and Hoover disliked one another with the FBI actually having a thick file on Redlich that accused him of associating with "subversives". He was the Dean of the NYU law school and lifetime supporter of the rights of the accused. He had a very distinguished career.
When Gerald Ford was informed of Redlich's associations with leftwing groups he raised the question of whether the WC should remove him. Warren and the commission debated the question with Warren leading the defense of Redlich. The commission agreed to let Redlich stay.
Here is Redlich on the assassination: "I think there are simply a great many people who cannot accept what I believe to be the simple truth, that one rather insignificant person was able to assassinate the president of the United States." Yes, that's sadly what happened.
For these conspiracists to claim that he would join up with essentially a right wing coup and coverup what happened is preposterous. If one thinks the WC report was a lie then that's what you have to believe. It's unavoidable.
Here is the NY Times obituary on Redlich who died in 2011:
https://www.nytimes.com/2011/06/11/education/11redlich.htmlOne of the sources for much of the above was Philip Shenon's book "A Cruel and Shocking Act: The Secret History of the Kennedy Assassination".