Oswald had the Tippit murder weapon in his possession when he was arrested
Says you. That’s yet another thing you cannot demonstrate is actually true because the police (either out of malice or sheer incompetence — and it doesn’t matter which) completely mishandled the evidence. By the way,
when Oswald was (illegally and without probable cause) arrested, the alleged revolver was allegedly in the alleged possession of the alleged Bob Carroll.
We know Oswald had "The Tippit Murder Weapon" because all 4 bullet shell casings that littered 10th Street and Patton Avenue were matched conclusively to the revolver Oswald had on him in the Texas Theater.
Shells don’t kill people. You don’t know what the “Tippit murder weapon” was because the bullets removed from Tippit did not have sufficient characteristics to identify a specific weapon.
And correction: the shells that you cannot demonstrate were ever at Tenth and Patton or related to Tippit’s murder were matched conclusively to a revolver that you cannot demonstrate was ever in Oswald’s possession.