I believe Libby represented Marc Rich at one time -- not sure whether he represented him at the time of the pardon.
Libby did represent Rich, but before his pardon. Libby made the gaffe of congratulating Rich on his pardon not long after he became Cheney’s COS. He did not use good judgment in that regard.
Libby not only represented Rich at the time of his pardon but called Rich from Clinton’s office to tell him he had the pardon which was against the wishes of the DOJ and the former US Attorney on the case was never notified which goes against protocol. Then he goes to work for Cheney?