No, they killed him off in the 3rd season by having him run over by a subway train un NYC,
The REAL Nitti committed suicide rather than face prison for tax evasion in the late 30’s or early 40’s and was succeeded as boss of the Chicago “Outfit” by Charlie Fischetti.
Hmmm ok I thought it was one of the earliest ones. Like the Ma Barker Gang episode. Remember that one? EN had nothing to do with MBG, oh well, it was still great TV
My favorite line from The Un:
Ness: Ok Nitti, what is it? The booze, the numbers, the girls ?