3 Season
51 Episode
Unsolved History - Season 2 Episode 5 The Saint Valentine's Day Massacre
On February 14, 1929, four men armed with submachine guns cut down seven mobsters in Chicago. Ironically, this famous mob event spawned the Chicago crime lab, introducing ballistics, polygraph, chemical analysis and forensic pathology to police work.
- Year: 2005
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- Genre: Documentary, Mystery
- Studio: Discovery
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