History's Greatest Mysteries (2020)

S6E3 The Valentine's Day Massacre

On February 14, 1929, Chicago witnesses one of the most shocking killings in organized crime history, which becomes infamously known as the Valentine's Day Massacre. While the 1920s and 30s are rife with gang-related slayings, this particular incident stands out for its sheer brutality and the difficulty in solving it. The question remains: who orchestrated the Valentine's Day Massacre, and what were their motives?