On the 14 February, gangsters affiliated with Al Capone carried out a mass murder of seven people in Chicago. The cold-blooded, execution-style murder of members of George Moran’s gang symbolized the type and extent of the violence that prevailed in Prohibition-era Chicago.
Richert, Lucas Paul. "St. Valentine’s Day Massacre". The Literary Encyclopedia. First published 01 November 2008
[http://www.litencyc.com/php/stopics.php?rec=true&UID=5595, accessed 14 February 2016.]