Personally, I was never overly interested about whether there was a single gunman or multiple shooters. I just assumed there were multiple shooters- albeit without solid proof.

However, I've always been fascinated in the whodunnit aspect of the murder. The Jack Ruby connection is a smoking gun for a murder conspiracy involving the mob. Why did he whack Oswald?

You shit-kicking, stinky, horse-manure-smelling motherfucker you! If you ever get out of line over there again, I'll smash your fucking head so hard you won't be able to get that cowboy hat on. You hear me? Fucking hick. -Nicky (Casino)