Other than a time machine it is difficult to understand how there could be any more evidence of the fact. What do you believe is lacking? The shots were fired from the 6th floor window at 12:30. Fired bullet casings from a rifle belonging to Oswald were found by that window. Oswald's prints are on the SN boxes. His prints are on a long bag found near that window. His rifle is left on that floor.
You can keep on reproducing this McAdams boilerplate till you're blue in the face, Mr. Smith, it still won't get you anywhere.
Let me repeat:
Even if we were to be foolish enough to accept all your claims here, you would still only have an evidentiary pattern that is ambiguous-----------it could point to Mr. Oswald as (suicidally stupid) lone gunman; Mr. Oswald as (suicidally trusting) gunman in a conspiracy; Mr. Oswald as (suicidally trusting) non-gunman but accomplice; Mr. Oswald as innocent patsy.
But I do sympathize with you in your frustration, Mr. Smith, I really do.
Concerned regards..........