How bad could it be? CIA in league with the mafia in league with the communists? We already all guess that. A league of defense contractors in the mix. A CIA wanting more Bay of Pigs against a President wanting fewer fiascos? A British House of Cards like plot where Jackie conspired to have her husband taken out because he had served out his purpose? We discovered that the coronor was bought off, or threatened to provide an incomplete autopsy? The FBI assigned the investigation to an incompetent tool in Delaware and the DOJ removed all the prosecutors and put another tool in charge? Or it was utterly corrupt and seditious but the PTB thought that the American people need to be shielded from the level of curruption and incompetence endemic to our federal government? I know this is all just the stuff of conspiracy theories with no basis for credence.
Absent information the imagination can run to a lot worse than could have happened. Moreover, however bad the thing that actually happened, it is only one thing and not everything else that we could throw in as well.
How bad could it be?
The story that filtered down to me was that Oswald was a CIA spy sent to russia. He married a russian woman. The russians turned him into a double agent and sent him back to the USA where he killed kennedy.