I know that John Gotti was refused a Catholic burial by a Bishop in New York. I believe Paul Castellano was also.
The guys routinely break almost all of the 10 commandments and never attend mass or anything, so you'd think they are all irreligious, but then fairly often you hear that one of them went to confession or something before they died.

I read that Demeo had gone to confession when he felt he was about to get whacked.
I bet that priest heard some shit...