When you cut through all the CTer noise, it was Oswald's rifle that was left at the murder scene. Some loons may claim there is doubt about his ownership or that the presence of his rifle on the 6th floor means that he was the person who used it, but absent any credible alibi or explanation for his rifle being found on the 6th floor, that alone is extremely incriminate. That is enough to convict him in any court. There are many other facts and circumstances that link him to the crime. It's a very simple case at the end of the day. I have no doubt whatsoever that Oswald fired the shots that killed JFK. I have seen no credible evidence that he worked with or for anyone in so doing. Certain aspects of the case such as his motive can never be known with certainty. Only Oswald knows for sure and he didn't tell anyone but the fact that we can't possibly know everything doesn't preclude us from knowing anything or create any doubt. The totality of evidence, facts, and circumstances confirm that Oswald did it.