Nicodemo would be going against everything he ever stood for and completely disgracing his family (in his and their eyes). He is not telling. Sorry to disappoint everyone who was sure it was a matter of time. South Philly is not like North Jersey or even NYC (although I admit I know nothing about NY). South Philly is a completely insular community where everyone knows everyone and everything that happens. He would literally rather die and prison before ratting. I know it's hard for some people to realize but there really are tough guys out there,even in 2015. They may not all be geniuses but that's irrelevant lol