title: Killeen Gang
text: # Killeen Gang
  
  The Killeen Gang was an Irish-American Boston-based crime organization started by Donnie Killeen. At one time, the gang was led by Whitey Bulger.
  
  Along with Bulger, Billy O'Sullivan was a notable associate. The Killeen Gang eventually combined with the Mullen Gang to become the Winter Hill Gang.
  
  