Well ,If we are going to play amateur sherlock holmes and proclaim someone guilty without being privy to the evidence how about the identity of the other gunman on the grassy knoll????
Then again QF will want to ban any advertising on that book because the taxi driver who dropped the gunman off on the grassy knoll flew QF on his next holidays!
However any publicity is OK for Lee Harvey Oswald because he had been on a skiing holiday a year previously at a certain resort in Japan.