Kevin Weeks (born March 21, 1956) is an American former mobster and a longtime friend and confidant to James J. Bulger, the infamous boss of the Winter Hill Gang, a crime family based out of the Winter Hill neighborhood in Somerville, Massachusetts.After his arrest and imprisonment in 1999, he became a cooperating witness. His testimony is viewed as responsible for the convictions of FBI agent John Connolly and mobster Stephen Flemmi.