He has long advanced the theory that DiFronzo was a snitch, and, yeah, it started when he didn't get indicted in FS.

Other people have wondered as well.

The problem of course is that Fosco has an ace to grind.

Anyway, I think the more realistic scenario is that they just didn't have enough to charge DiFronzo with. That was the official line.

If memory serves Calabrese said DiFronzo was at the Spilotro murder, but, apparently, they didn't have any corroborating evidence.

This became a little controversial because people said that other people were convicted on Calabrese's word alone, but that wasn't really true, they had at least some kind if evidence on everyone else.

Anyway that is what I remember; it was a long time ago.