The Night Chicago Died the U.S. at the height of its popularity because of contractual issues. "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, although that involved Capone's men killing seven of Bugs Moran's gang members and had nothing to do with the police. The song's events supposedly take place "on the East Side of Chicago". Chicago has three commonly referred-to regions: the North Side, the West Side and the South Side. There is no East Side, as Lake Michigan is immediately east of
Saint Valentine's Day Massacre that both machine guns be brought there at once. Through the then relatively new science of forensic ballistics, both weapons were determined to have been used in the massacre – and that one of Burke's Tommy guns had also been used to murder New York mobster Frankie Yale (who participated in O'Banion's murder) a year and a half earlier. Unfortunately, no further concrete evidence would surface in the massacre case. Burke would be captured over a year later on a Missouri farm. As the case against him in the murder of Officer Skelly was strongest, he was tried in Michigan