Ive got two questions regarding Nicky Barnes

1st question is , was/is he considered a "mobster"? When i think of a mobster , i think of a "gangster" , that belongs to a criminal organization , that dabbles in a wide variety of vices (loansharking,drugs ,rackets,bookmaking ,prostitution , etc etc). I think Nicky only dabbled in one of those (drugs). I have not read up on him doing much of anything else.

2nd question is , Nicky had a made man ( forgot what family he belonged to) killed because he sold him bad drugs and gave him the run around , disappearing for a few months. Nicky had the inkling that he may have been an informant. After his (Nicky's) men tracked down and killed the made man , Nicky sat back and waited for reprisals from the mafia family , but it never came. Why dont you think the mafia family went after Nicky for killing one of their made guys?