Thats my point too, meaning this guy obviously knew on who was who in the policy and narcotics racket around the South Side.
I remember reading about some members and non-Italians having thoughts during the early 60s about Ferraro being an informant or somebody else from the south side....even Les Kruse looked Ferraro as weak individual but besides that, they were almost right since one of Ferraros crew bosses Ralph Pierce was in fact one of the informants.
The thing is that the informant we are talking about, besides being involved in the policy game, he also sold dope and according to numerous infos both Ferraro and Alex didnt tolerate drugs, but instead there was one capo from their faction who was deeply involved in the dope trade and that was Skids Caruso....so maybe the informant was from his own crew since Carusos group was mostly made out of Italian members...i think this is a job for Ed