Background on the St. Valentine's Day Massacre is deep and plentiful. Disputes between both the South-Siders and the North-Siders were often. Once the tension levels between the two gangs grew to an all-time high, Jack McGurn (Capone's precedence) planned a notoriously successful massacre that would kill the North-Side's leader, Bugs Moran and his men. First, McGurn earned their trust with an illegal alcohol transaction. He asked for another transaction, and he got one. It was planned to be at 10:30 AM, February 14, 1929 at the S.M.C. Company Garage. This is when and where the killings would happen. McGurn and a few other South-Siders arrived dressed as policemen. His plan was to trick the 7 North-Side men into lining up against the wall for a "pat-down", where he would shoot them with a Thompson machine gun. Although they did kill Bugs Moran, his plan worked for the most part. His men fled and no one was charged for any of the murders. This attack ended Moran's power in northern Chicago.