Frank Gangi. I would think you have to put him in there since it seems he just woke up one day and realized he needed to make a change. I know he got picked up for a DUI but in light of what he was involved with, that isn't even a blip on the radar. I can't imagine that making him flip. I believed he really had a change of heart.

From the NY Post:
Later, Gangi got arrested for drunk driving — and he immediately called for a detective, ready to turn on his old friend Tommy, even though he was only facing a ticket. “This is about murders, terrible murders,” he told the arresting cop, according to Carlo. Gangi just couldn’t live with the guilt.

Read more: http://www.nypost.com/p/news/opinion/books/item_3FB2rmiQfsvfPLchryD62J#ixzz1yprrd4qk