if I had to bet my life on one side or the other, i would probably have to go with Oswald. He could have made those shots, was obviously in the building, etc. I did lean back to Oswald when I first heard about the raised seats in the back of the limo, as it explains the only way a bullet could possibly have hit both men where it did.
But a "magic bullet" is still required to do everything the Warren Commission claims it did. and I think even many pro-Oswald people believe the bullet you showed was dropped onto the stretcher after the fact.