Interesting that, if I recall correctly, Oswald's hands were tested for powder burns, and it was determined that he had not fired a weapon that day. That leaves a huge hole in the official version of events, one that has never been addressed, apparently.
I certainly don't believe that the secret service agent, George Hickey, supposedly shot JFK by accident from a car behind, but that's just my feeling. ('Mortal Error: The Shot that Killed JFK', by Bonar Menninger)
However, supposedly the 'head shot' was a different type of bullet from the others which hit Kennedy, at least that Colin McLaren (the Australian who investigated the case on the tv show 'JFK: The Smoking Gun') believes, which would make this a whole different case with more shooters.
I remember my Dad, who was very familiar with guns and rifles, saying that there was no way Oswald could have accomplished this, he never believed it.
November 20, 1963, 'Rose Cheramie' was telling about the coming assassination:
https://www.kennedysandking.com/joh...ramie-how-she-predicted-the-jfk-assassination
Seems the assassination was originally planned for Florida, that fell through, then Dallas became the target area and Oswald was, handily, working in a building right on the parade route - and he became 'the patsy'.
Just my opinion that the conspirators were waiting for their chance, it was going to happen, just a matter of where and when.
All these years later, and it doesn't seem that a really thorough investigation into all the people supposedly involved was ever done, that's sad.