This is kind of my sentiment. Of all the Outfit stories... I mean, no doubt, it is an amazing piece of Chicago lore... and unbelievable.

But from what I know about it, it's pretty much what you describe.

A group of robbers make the galactically insane decision to rob one of the most powerful mob bosses in the country and are all subsequently murdered.

And, yeah, Patterson plays Mandell... who definitely was killed.

I guess if it's true to the story, someone will be playing Frank Calabrese, if they show the murder.