. . .
So, let's start here; knowing what physical evidence is available, how would you have set up Oswald?
I would need Oswald?s cooperation.
I would need him to see the importance of him appearing to be the assassin.
I would need him to leave the building as soon as possible.
I would need him to go get a handgun.
I would need him to go to an area where a policeman would be murdered.
I would need him to act suspiciously, to duck into a shoe store to attract attention, as a police car passed by.
Then to duck into a theater without paying to attract attention, as another police car passed by.
And to pull a gun on the first policeman to approach him in a theater.
In addition, there would be other work to be done.
But if one can get Oswald?s cooperation in all these things, then framing him would be pretty straight forward.