Nicholas Calabrese

Nicholas Calabrese
Calabrese's December 6, 1990 FBI mugshot
Born(1942-11-30)November 30, 1942
Chicago, Illinois, U.S.
DiedMarch 13, 2023(2023-03-13) (aged 80)
Other names"Nicky Slim"
OccupationMobster
RelativesFrank Calabrese Sr. (brother)
AllegianceChicago Outfit
ConvictionsRacketeering (1997)
Murder, racketeering (2007)
Criminal penalty70 months' imprisonment (1997)
12 years and four months' imprisonment (2009)

Nicholas W. Calabrese (November 30, 1942 – March 13, 2023) was an American mobster and hitman, best known for being the first "made man" to testify against the Chicago Outfit. His testimony and cooperation with federal prosecutors helped result in the 2007 murder convictions of mobsters Joseph Lombardo, James Marcello, and his own brother, Frank Calabrese Sr.