The Killeen Gang was an

Irish-American , image = Irish ancestry in the USA 2018; Where Irish eyes are Smiling.png , image_caption = Irish Americans, % of population by state , caption = Notable Irish Americans , population = 36,115,472 (10.9%) alone ...

Boston-based crime organization started by Donnie Killeen. At one time, the gang was led by

Whitey Bulger James Joseph "Whitey" Bulger Jr. (; September 3, 1929 – October 30, 2018) was an American organized crime boss who led the Winter Hill Gang in the Winter Hill neighborhood of Somerville, Massachusetts, a city directly northwest of Bos ...

. Along with Bulger, Billy O'Sullivan was a notable associate. The Killeen Gang eventually combined with the

Mullen Gang The Mullen Gang was an Irish-American gang operating in Boston. Gang members Paulie McGonagle (died November 1974) was a Boston mobster and onetime leader of the Mullen Gang, a South Boston street gang involved in burglary, auto theft, and a ...

to become the

Winter Hill Gang The Winter Hill Gang is a loose confederation of organized crime figures in the Boston, Massachusetts, area. The gang members and leadership are predominantly Irish-American and Italian-American descent. The organization itself derives its ...

References

Gangs in Massachusetts {{crime-org-stub