I'm pretty sure that when you're convicted for killing your pregnant girlfriend, a NFL ban is a moot point. (he scraped by on the actual murder charge but was convicted on the conspiracy to commit murder charge, which of course makes no sense, but he still got 18+ years for it, so whatever)

And how the hell did Dexter get banned for failing 4 drug tests? The guy had more sacks than Reggie White did on the Packers. It's a shame he caught a lifetime ban when Darryl Strawberry's had more failed drug tests than Home Runs and no-one's batted an eye.
Pheebz Doesn't Swallow