If not Oswald, the true assassin(s). Oswald's rifle served would be tied to the owner.
I'm open to any conspiracy but you're gonna have to come up with some sort of alternate narrative otherwise the WC conclusion is the only logical conclusion that fits the evidence, and let's be honest there are few if any murders in history that have accumulated a literal mountain of evidence with thousands of exhibits and hundreds of eyewitnesses which can only lead to one man, Lee Harvey Oswald.
JohnM