Eliminating eyewitness testimony and relying on the false medical evidence is not an effective way to find the truth. The medical evidence in this case is totally fraudulent and it has taken researchers decades to get the real story. We don't know who the real killers were with any certainty. However, it wasn't Oswald, unless he manifested a second body to the right front of the president. See Douglas Horne's important research on the medical evidence for some very disturbing research. How do you reconcile the false autopsy photos with the testimony of the vast majority of the witnesses who clearly stated there was a large hole in the back of the head? Not one bit of the medical evidence makes any sense. Look at how the HSCA struggled with the medical evidence. There were several pieces of metal found in the president's body at the autopsy that were reported by a reputable witness with no reason to prevaricate (Dennis David).
If "Lee Hardly" was the assassin, everything would be extremely clear and no cover-up would not be necessary. We would see exit wounds on the front of the body, right? Where are these exit wounds? Instead, the entire case is riddled with jaw dropping inconsistencies, witness intimidation, and several murders of vital witnesses. Just one example: why would LBJ call Parkland Hospital to coerce Dr. Crenshaw into wrestling a death bed confession from the dying Oswald? Also the medical evidence includes the SBT, which is impossible for several reasons, yet lone nutters continue to stubbornly embrace this moronic theory. Arlen Specter deserves a lot of scorn, not only for the monstrous lie of the SBT, but also for threatening and deliberately changing witness testimony that contradicted the false government account of the shooting.
Another thing...some folks seem to believe that since the real assassins weren't caught, they don't exist. In truth, the assassination was a huge success, since a patsy was framed and the real assassins escaped. The obvious political reasons for the assassination were silenced and the world hasn't been the same since.