I'm mystified by the CT compulsion to find somebody, anybody other than Oswald was behind the JFKA.
Religious dogma cannot be proven. The Oswald-did-it narrative was proven a long time ago. The fact that so many reject it is their shortcoming, not the narrative.
Since you are an attorney, I have to think you have a healthy respect for evidence. Just what evidence is there that makes you think somebody other than Oswald was involved in the crime?
Ah, epistemology - my favorite topic! Religious beliefs cannot be proven in any ultimate ontologiacal sense because they by definition deal with matters beyond our reality. Ditto for atheistic beliefs - the nonexistence of a deity cannot be proven (and some 20% of atheists do hold beliefs that are amazingly "supernatural"). However, there is scientific and anecdotal evidence that bears on the religious questions, as well as reasonable inferences from that evidence, and philosophical reasoning. By diligent study and reflection, one can arrive at a high level of conviction. If someone has done the work and holds a 95% level of conviction in materialistic atheism, Catholicism, Islam or Scientology, I can only explain why I think differently but I can't screech "You're wrong, the truth is obvious!" We see again and again and again on religious forums and many others that a very large percentage of people simply cannot abide doubt or ambiguity. They cannot admit, to themselves or others, "Yes, I hold a high degree of confidence in my convictions, but they are just convictions and I have to acknowledge they could be partially or wholly wrong." Hence, most "discussions" sound a great deal like this forum: "What is the matter with you? Why can you not see how right I am? It's so obvious!"
Atheists also play a game that seems to underlie your posts: "Hey, it's your religious claims that are extraordinary. You have the burden of satisfying me, and it's a damn high bar because extraordinary claims require extraordinary evidence. Materialistic atheism is the default position for any intelligent, rational person." This is, of course, completely false. There is nothing inherently more extraordinary about the existence of a deity than the nonexistence of one. There is nothing inherently more extraordinary about the existence of a higher level of reality than the nonexistence of one. This is a game internet atheists play because they are as mindless about their beliefs as most religious believers and this game frees them from the obligation to justify their position. It's all just "Hey, you gotta convince me." No, I don't have to convince anyone but myself. If I were trying to convert an atheist, or vice versa, then indeed the burden would be on he who was trying to do the converting - and the standard still wouldn't be whether I had met some imaginary standard of extraordinariness, but simply whether I had convinced my listener.
Ditto with the JFKA: There is nothing inherently more extraordinary about a logical and internally consistent conspircy theory than about the LN narrative.
Who killed JFK and why is a real-world question and thus differs from religious ones in that respect - but the epistemological principles are largely the same. The fact is, the WC was an agenda-driven inquiry that intentionally avoided some critical questions. The HSCA was staffed largely by conspiracy enthusiasts, had an organized crime orientation, and bought into dubious acoustical evidence. Some 62 years of inquiry and debate has generated lots of new information. Just as with religion, the field is polluted by folks who can't think clearly. (A key epistemological principle is that for beliefs to have epistemic justification - not to be true, but just to be justified - the believer must have "cognitive faculties properly operating in an environment in which they were intended to operate." IMHO, an awful lot of people on a forum such as this would not make it past the "cognitive faculties" threshold.) The LN narrative is a compelling and evidence-based one, but it hasn't eliminated all doubt by any means. If someone is an LN fundamentalist or a CT fundamentalist who can't acknowledge the doubt and uncertainty inherent in his convictions, then the discussion is just like a religious one in which "doubt-free" Catholics, Baptists, Mormons and Jehovah Witnesses just screech at each other.
It's not my burden to present "just what evidence" makes me believe what I believe, and that exercise is futile with a fundamentalist anyway. My modicum of doubt about the LN narrative is based on a host of factors, some of which I've explained here. One is just that a Mafia hit in many ways just "makes more sense" and is inherently more believable to me than the LN narrative. Did Carlos Marcello actually confess to Jack Van Laningham? Did Santo Trafficante actually confess to Frank Ragano? I'm not saying absolutely yes to either, but the accounts are evidence that demands to be considered and evaluated. This is true of virtually every aspect of the JFKA. If someone has done his homework and decided the WC narrative is true, that's fine - but the mistake is thinking that one's convictions equate to ontological truth, that it is heresy even to challenge them, and that anyone who holds different convictions is
ipso facto wrong.