I know that Cicci was, in I, the guy taking a shave while smoking, leaving the barbers smoking, waiting in the stairwell smoking, then finally blowing away one of the heads of the Five Families in a wazzit--turnstyle thing-y that goes round 'n round.

Cicci is also the one who approaches Tom and Tessio at the end of I and says Michael would go in his own car (Tessio: but that screws up all my arrangements!)

A fairly important member of the Corleone Family, up and rising. Apparently somewhere between I and II, he gets busted by the Feds, then testifies against Michael and the Corleone Family in II (yeah, there were a lotta buffas).

Crazy.

But what do you think Cicci got busted for? I mean, he betrayed not only the memory of Clemenza (who he apparently worked for before Clemenza died), but disgraced Frankie Five Angels (although Frankie Five Angels attempted to do the very same thing Cicci did).