https://en.m.wikipedia.org/wiki/The_Night_Chicago_Died
"The Night Chicago Died" is about a shoot-out between the Chicago Police and gangsters tied to Al Capone. It was inspired by the real-life Saint Valentine's Day Massacre,[3] although that involved Capone's men killing seven of Bugs Moran's gang members and had nothing to do with the police. No confrontation large enough to leave around one hundred police deaths ever happened. Al Capone was arrested in 1932 for income tax evasion.."