"SO AND SO IS THE HIGHEST-RANKING MOB MEMBER TO TURN INFORMANT"

I could swear that this phrase has been used on almost all important mobsters turned informants. Lol! (Or I just see it used all the time) sort of like the "number one best seller" title used for books.

Correct me if I'm wrong, but I think this title as been used for Sammy Gravano, Joe Massino, Al D'arco and I think even Phil Leonetti as he was underboss in Philly at some point.