Moe, I think it's well known that the Chin went nuts when he heard about this whole thing. Just from the things you DO know about Vincent, he doesn't sounds like the type of guy who would order, or okay the murder of a cop... logically speaking. For fuck's sake the guy used to go around in a bathrobe acting crazy, why would he want the extra heat of a cop murder in his family.

The truth is always grey, not black or white. You can't automatically say the mobsters were guilty and the cop was telling the truth. You know the police have their own blue line of silence, their own "omerta" that is still prevalent, arguably more so than the real "omerta" of today's mob.

Remember how Joe Pistone would vehemently defend Lin Devecchio? That's just ONE example off the top of my head.