Well let's not forget that the guys in that FL shoot out were finally stopped by an agent with a lowly .38spl.
Once again proving that it's placement that counts most.
Not to argue Brett, but they made a very detailed training film regarding that shootout, and if I recall correctly, and I may not recall correctly, a Spanish agent decisivel slowed the mobility of the perps in shootout with an 870 Remington pump shotgun. I could be wrong, but on the interview in the film he talked about being wounded and having problems with working the action with his legs and one hand. The same agent name Mirelees did put the coupe de gras on the the final combatant,(Pratt, or Platt I can't recall) with a revolver, but he already was riddled with shots.
The Hollywood shootout was a poor tactics situation, and the determination of the perps. One guy (perp) was hit in a major artery and as he walked down the side of a car, every time his heart beat it splashed on the side of that car. It was erie to look at the actual car, and see how much damage this man had, and was still fighting. His mind set was incredible, and was much talked about in the training.
That shootout ushered in the new era of heavier caliber for the FBI. They at first went to the 10mm, but some could not handle the recoil, and it was shortened to what we now call the 40 S&W, which in my opinion is an excellent round for law enforcement, or personal protection.
Mindset is a class that I have taught, and seen work for me, and at least one officer I trained whom fought to the death, and won. That officer is now also retired, and living in east Texas. He recently in a conversation after many years, credits that class I taught, and I was happy to have played a small part in his survival. He gave me far more credit than deserved, for he always was a gritty individual.
As far as shooting fat boys with a 9mm, the 9mm although in my opinion anemic will usually always out penetrate a 45acp, and in ball ammo many times a 357 mag. It is CALIBER and BULLET SHAPE that is the 9mm's down fall. I'm sure most here know that the 357sig, is not a 357 at all but, a 9mm bullet in a necked down 40 S&W case.
I suspect a 45acp, 40 S&W, and the venerable 357 magnum will still handle the FATTEST BOY walking. And on the up side, fat has never been indicative of speed, and agility, but it does make for a much bigger target.