Thanks again, NYM, for another quality bio of an influential and shadowy guy. Kurins and O'Brien had an interesting relationship with him, which they wrote about in "Boss of Bosses."
I did read that book many years ago. Maybe I'll give it another go.
So did I..& wish 2 give it another whirl...if I can find it in my messy mess of a library ..the 2 agents can also be found on certain youtube docs reliving the Castellano bugging as well as the surveillance on the Cameron ave. Comm. meeting.