I’m pretty sure Michele Maggio is the one who sponsored Bruno. It’s been a while but I believe I read that in the book Before Bruno. I highly recommend that book which is very thoroughly researched. The author Celeste Morello is a relative of the Morellos if I’m not mistaken. Her great grandfather was a prominent member of Sabella’s gang. It’s broken up into three parts starting in the 1880s but I read the last installment which chronicled 1946-1959. She spent like 15years researching and interviewed tons a mafiosi who apparently trusted her because of her family history. Very good info in that book and I’m sure even more in the others.