MTG--
Thanks for your collegial comments. It is possible to have disagreements about the JFKA without rancor and churlish sniping!
My best guess---and it is a guess---is that the JFKA CT was possibly just two guys, from Alpha 66 (or something called Command-L) and LHO.
If a couple guys in Alpha 66, for deep nationalistic, ideological and personal revenge reasons (see BoP) decided to perp the JFKA...why would they tell anybody?
One was a shooter behind JFK, and the other was the GK smoke-and-bang show. If they were Herminio Diaz and Eladio Del Valle, they were both dead by 1967, and LHO in 1963. Dead men tell no tales. They kept no paperwork, and acted on no one's instructions.
We see from the Trump and Kirk shootings that anyone reasonably skilled with a rifle could have perped the JFKA. The JFKA "trained assassins" mumbo-jumbo is for the pulp novels.
I have no compelling answer of how the Alpha-66 pair gained LHO's witting or unwitting cooperation. Del Valle had been a pol in Cuba, and can be presumed to have some brains and social skills. They may have learned about LHO through the Cuban grapevine, and told him of passage to Cuba if he cooperated in a pro-Castro protest.
Marchetti's explanation of the JFKA cover-up may ring true. It was figured out or suspected that that CIA assets were involved in the JFKA...and so the investigation thus became a LN prosecution. That was Dulles at work. The nuclear-war concern, and LHO visit to Kostikov, may have been factors too.
The media and investigation? See coverage of the Kirk and Trump shootings. The media follows a narrative, and agenda. Maybe investigators do too.
In general, I lose faith in large many-headed CTs...on any topic.
For example, I do not believe that the three autopsists in Bethesda actually saw an obvious large avulsive or exit wound in the rear of JFK's head, and then never spoke a word about for the rest or their lives, or even left behind a letter to be opened after death, or anything in that regard. Yet they resected JFK's scalp (peeled it away from the skull). They would have seen such a wound.
I concede this is baffling, given the comments of those in Parkland. Well, so I am baffled.
Well, as I always say, just IMHO, caveat emptor, and draw your own conclusions.