“And there is no doubt about Oswald shooting officer Tippet. That’s not something an innocent person would do.”
Except the only witnesses to that shooting said it was a man who looked more like Jack Ruby than Oswald.
I don’t know where you are getting your information on the murder of officer Tippet, but there was more than one witness and they picked him out of a lineup that night and the next day.
There were other witnesses who identified Oswald as he went from the murder scene to the Texas theater.