He's been clean since and has gone 19-4 since winning/losing the title to Randy at UFC 36 over 10 years ago beating the likes of Antônio Rodrigo Nogueira, Mark Hunt, Alexander Emelianenko, Jeff Monson, Sergei Kharitonov, Brett Rogers. I'd like to see him be given another shot.
He got busted again a couple of years ago in the run up to when he was meant to face Fedor.