The part of the interview where Casso talked about the mafia cops is on the 60 minutes website. It's only around 3 minutes long.

http://www.cbsnews.com/video/watch/?id=687069n

But until Little Frankie put it on youtube the main part of the interview which is around 13 or 14 minutes long was impossible to find. Try PMing Little Frankie and maybe he can help you out.