Who killed JFK?

[themaninthejinnahcap]

The CIA, who were concerned about JFK's stated desire to shatter the Agency in disgust after learning the kind of shenanigans they were willing to engage in like Operation Northwoods.

The Mob, who have been known to work with/for the CIA and who were certainly not very happy with the failure to overthrow Castro and JFK letting his busybody brother go after Hoffa and their money.

Oswald, his motives are debatable until the cows come home, but there's enough tangible evidence to convince me he was at least there and probably participated in the operation.

Somewhere between those three you have an answer, but personally I suspect the CIA was calling the shots (literally and figuratively).