On a freezing Chicago morning in 1929, seven men lined up against a garage wall — moments later, they were gunned down in one of the most chilling executions in American history. In this episode of Crimes of History, we uncover the brutal truth behind the St. Valentine’s Day Massacre — a meticulously orchestrated hit that defined the Prohibition Era, exposed the power of Al Capone, and left behind one of the nation’s most enduring mysteries

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