Dallas Police Tapes were found of the events of Nov. 22, '63; and they worked out the "dictabelt" Dictabelt article and found there were four shots and listening to the tapes, a lot would agree with that.
But now, it would be the same sort of deal to say, "no, still 3 shots" like looking at what the Zapruder films seems to say; and I do understand the argument of hitting a target and the way it might move. -----------
I'll still be a John Candy fan no matter what; he played Dean Andrews in that movie; curious; 
Quotes from the movie (the real life guy was supposed to be something like this):
"Why you keep dancing on my head for, my man? We been thicker'n molasses pie since law school."
"They put the heat on, my man, just like you're doing. I gave'em anything that popped into my cabeza. Truth is, I never met the dude."
"Hey, pipe the bimbo in red. What ever happened to that little gal you was dating in the Quarter - from Opelousas, y'know, elevator didn't go to the top floor but t--s could smother gumbo with."
And more pertinent material from the movie at script