Does the winter hill gang still exist these days?
No
I'm reading blackmass and what I understand is that the Winter Hill become powerful because Connolly sabotaged the investigations of Dea,Boston Police and other fbi agents that led to the killing of all the witnesses against Flemmi and Bulger.
So when Bulger fled and Weeks flipped in 2000 the gang is done for sure there are some irish gangsters on the streets but the old days are gone.
I find some names on the web
George "Georgie Boy" Hogan,Kevin O'Neil,John Joseph "Mick" Murray, Jerry "Poker Face" Perkins ecc