In 1929 Chicago, a brutal mob hit known as the St. Valentine's Day Massacre forever altered the course of organized crime in America. Blood on Valentine's Day delves into the turbulent world of Prohibition-era Chicago, where gang rivalries, political corruption, and ruthless ambition converged in a single, blood-soaked day. Through extensive archival research, gripping eyewitness accounts, and modern forensic insights, this book offers a comprehensive exploration of the massacre, its investigation, and its enduring impact on American society. Discover the hidden stories behind one of the most infamous events in mob history-a tale of violence, betrayal, and the relentless quest for justice.