That had to have been before he started taking his meds, in his granddaughters book she published personal hand written letters in his last year's of alcatraz and the letters was coherent

"McGurn likes you, so I make you. So you are now one of us, if you fuck up, we take it out on McGurn. He is your sponsor. Fuck up, it's his ass. You work in his crew, he is your capo."