Wall of Oswald guilt is full of missing bricks from the very begining and LNrs are trying to fill it for 58 years now. Not a single brick in your wall is 100% true evidence for his guilt.
Just like no single pixel in a photograph is proof of the overall picture. The case against Oswald, as set out by Vincent Bugliosi, is not made up of 53 facts each of which prove Oswald guilty beyond a reasonable doubt by themselves. Rather, those 53 very probable facts together provide proof beyond a reasonable doubt of his guilt.
One undisputable fact, however, that has been proven beyond a reasonable doubt, is that JFK did not fake his own assassination.