Anyone with half a working brain knows it, but few would admit to it, even today 60 years later.  There was a lot more to this story than we'll ever know, but even back then the CIA and most other "gubmint agencies" were not what you thought they were, nor did they actually have any "job to do" except hide things from the American public.

We live in an entire country of liars and thieves, crooks and creeps. 

https://www.westernjournal.com/jfks-nephew-goes-public-tucker-carlsons-insider-bombshell-cias-murder-uncle-successful-coup/

When a good man like JFK was murdered (I still think old man "criminal" bush had a lot to do with this, as well) I have trouble with using the word "successful".