Step 1 : Introduction to the question "3. Which of these claims has been made by conspiracy theorists about the evidence in the JFK assassination case?"
...1. All of these 2. There was tampering with photographic evidence 3. An impostor impersonated Oswald 4. There was tampering with the medical evidence It has been said that there was tampering with the Zapruder film and with the so-called "backyard photos" of Oswald holding rifles and Communist newspapers. It has also been said that there was tampering with medical evidence - and with the body of JFK. In addition, it has been said that the "setting up" of Oswald as the fall guy included impersonators who claimed - loudly enough to make an impression - that they were Oswald.