There was another gang working with beer and two of the four of Al Capones men where dressed as cops and walked in on the other gang and they thought they would do a normal bust, but the two other Al Capone men would come in. Thats where the four men open fire on the seven men with 500 bullets. When the real cops show up they found out that Al Capone might of had somthing to do with it, but Al Capone had an alibi and it was clear that he was not in the city when it went down. When the government started to look in to Al Capone and how to put him behind bars.