The movies true life flaws.
First off, this movie is definitely well made and entertaining but l tend to have problems with films that proport to be based on a "true story" but are in fact anything but. In real life Elliot Ness was not married during the events of the Capone case. I believe he had a girlfriend but Ness was both wifeless and childless. Ness's prohibition squad had a couple of dozen men assigned to it instead of merely four. It's primary job was to shut down Capone's operations and make it extremely difficult for him to make any income. There was a adjunct squad of IRS agents who in the end were responsible for putting Capone in jail for tax evasion. The nifty trick of switching juries would have been legally impossible to do and would have ensured that Capone's conviction would have overturned. And then there's the problem with Frank Nitti. The real Nitti was far from being the type of psychotic killer that he was portrayed as. In fact Nitti would eventually take over the Capone organization and would live into the 50's. And these are just the major mistakes they make. There literally dozens of more minor ones.