4. Princess Diana. The theories range from the Royal Family killing her on purpose to her actually dying in a car crash. It is very mysterious and suspicious. After all, people say she was alive after the crash and it took around 30 minutes for her to be loaded into an ambulance.
5. Harold Holt went for a swim never came back also has a swimming centre names after him.
6. Bobby Fuller (famous for the first big recording of I Fought the Law), was called a suicide or an accident, but the autopsy report literally had question marks on it.