It's been demonstrated repeatedly. Your response is to just bleat "there is no doubt of Oswald's guilt" over and over again as if your lack of doubt proves anything.
You'll never be able to show that the revolver Hill fished out of his pocket 2 hours later which was then and only then initialed by everybody at the police station (including by a guy who never supposedly even touched it to begin with) was ever at the Texas Theater in anybody's waistband.
You'll never be able to show that the partial palmprint that turned up on an index card in Washington a week later was ever on the barrel of CE 139.
It's NOT been demonstrated repeatedly. Your response is to just bleat "there is a problem with the chain of custody of much of the evidence" over and over again as if your lack of doubt in the validity of the evidence proves anything.
You'll never be able to show that the revolver in evidence was NOT the revolver taken from Oswald while inside the theater. If you could, you would have by now.
You'll never be able to show that the partial palm print was not taken from the barrel of CE 139. If you could, you would have by now.