CTers have suggested many times that there should have been MORE prints on the rifle and bag if Oswald had handled it. They note the absence of rifle oils etc on the bag. And on and on. It is a hopeless and impossible task to use facts, common sense, and logic on contrarians playing defense attorney. When you use logic, they respond with illogic. When you use illogic, they respond with logic. A circle of futility.
It's revealing that every piece of evidence they demand be shown in the assassination of JFK to persuade them of Oswald's guilt can be provided in the shooting of Tippit. If they complain about the absence of "A" in one case it can be shown to exist in another. Their demands in the second case are met.
The two cases then can be a sort of test or comparison to show the sincerity of a person's demands.
So do they accept that evidence in the shooting of Tippit? Their demands have been satisfied, their questions answered: the same ones they want in the assassination of JFK. But again they reject the evidence there as well. The multiple witnesses, the physical evidence, the circumstantial evidence. Everything they wanted in one event can be found in the other. But they reject this too.
There are "good faith" arguments to be made. And "bad faith" ones too. Putting the two events side-by-side reveals the good ones from the bad.
Shorter: If you want to believe in a conspiracy, if you have some weird need to absolve Oswald, you can say and believe in a lot of strange things along the way. This is an example of it.