The CIA will never admit the whole truth on the matter. I have watched a large number of documentaries on the subject including many in which the CIA had a role in creating through the Smithsonian Institute, KQEQ, PBS and including various independent investigators all coming to different conclusions which support narratives that obfuscate the truth and protect the guilty.
Of all the documentaries I've ever seen, there are two that I've found which shed the most light on details and in my mind register the most truth.
These two documentaries are mind boggling and disturbing but a must watch for anyone seeking the truth. They will have you pausing the video and saying WOW a lot.
#1 - Everything's a Rich Mans Trick
Runtime: About 3 hours - worth every second!
#2 - Dark Legacy
Runtime: A little over an hour
Also, not related to JFK but on the topic of just how much influence does the CIA have in supporting their narratives in Hollywood (not even taking into account the huge influence they have over mainstream media) - I saw this video just today by Al Jazeera:
The Listening Post - Covert operations: How the CIA works with Hollywood - Listening Post (Feature)