We won't know every last detail. Some things are unknowable.
What we can say, based on the evidence, is that Saint Patsy murdered two people on 11/22/63 beyond any reasonable doubt.
There are those that will never be convinced that the accumulated evidence is genuine. In essence their position is; the evidence isn't real, therefore the case is unsolvable. It's safe to say they'll never know what happened.
Which is why the debate will go on forever.