As far as the Sammy-as-dope-dealer thing, did it ever really matter? Looking at the only transcripts I have of his testimony in the Gotti trial (The Gotti Tapes, which is admittedly abridged), he doesn't say anything under oath about dealing one way or the other (only that the administration didn't "ok" dealers, they just looked the other way).

I think Casso just lost it after the Gigante trial (which was really his only shot at a "Sammy deal").