Yes the move The Town seems to be based on this crew, here's some Info from their case file. Copy & pasted from findacase.com.

For nearly four years Michael Fitzgerald and John Houlihan ran a ruthlessly efficient drug ring from an unlikely command post Kerrigan's Flower Shop, Charlestown, Massachusetts. The organization commanded the allegiance of numerous distributors, stationary and mobile, including Jennierose Lynch, William “Bud” Sweeney, George Sargent, and Alan Skinner. These minions, and others like them, helped the organization supply cocaine to hordes of buyers through an elaborate street-level distribution network that arranged most of its sales with the aid of electronic pagers, assigned customer codes, and preset rendezvous points.Fitzgerald and Houlihan imposed a strict code of silence on all who came into contact with them, including their own troops. They dealt severely with persons who seemed inclined to talk too freely. Joseph Nardone, a professional assassin who bragged that he was the “headache man”-when the organization's chieftains had a headache, Nardone got rid of it-acted as the principal enforcer. Over time, the gang's targets included Sargent, Sweeney (who survived multiple attempts on his life, but was left paralyzed from the chest down), a rival drug dealer, James Boyden III, and the latter's son and helpmeet, James Boyden IV.The Fitzgerald-Houlihan axis dominated the Charlestown scene through 1993. Ultimately, the authorities broke the code of silence and a federal grand jury indicted twelve individuals.