I tend to disagree, respectfully. I think we are much closer, depending on what you mean by closer to knowing, of course. In addition, there is plenty of factual evidence v circumstantial evidence. He has now been found to be lying about his whereabouts / comings and goings, and cannot provide a reasonable explanation as to why he changed his name multiple times. He admitted he knew Marion.yes but if they can’t get him, everything else is circumstantial so far and we are no closer to finding out what may have happened.
In saying this, I don't know that we will ever know Marion's fate. I am very interested to see him be questioned about this, specifically.