I did quite a bit of my own research back in the day when the Oliver Stone film came out. The film really struck a chord with me (I was alive when JFK was killed and remember the event). There was compelling evidence against the lone gunman theory ... and there was compelling evidence for it. The thing was, though, the amount of compelling evidence for consipiracy vs. Oswald acting alone was in the nature of a thousand to one.
I read 8 or 9 books on the subject before forming my opinon ... and I'm not willing to repeat that extensive research now. But I'm open to discussing it.