shanneba
Professional
Generations of Americans assume that Al Capone was responsible for the St. Valentine's Day Massacre, the execution-style slaying of seven associates of rival mobster George "Bugs" Moran in a Chicago garage on February 14, 1929. In fact, Capone, the flamboyant Chicago crime boss, was never even questioned in the murders. No one was ever tried in the case, leaving the St. Valentine's Day Massacre the most spectacular unsolved crime in gangland history.
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The 1929 St. Valentine's Day Massacre: 5 Unsolved Mysteries | HISTORY
It's the most spectacular unsolved crime in gangland history. Mobster Al Capone had an airtight alibi.