The G.H.O.S.T. Enforcer was a man who was one of the members at the Annual meeting of the International Brotherhood of Evil. He was probably killed by Stradivarius Cain.
Behind the Laughter
The G.H.O.S.T. Enforcer recently appeared in The Simpsons: Tapped Out as a non-playable limited time character that can be earned during the Secret Agents 2017 event by completing all of the Situation Room's G.H.O.S.T. dossiers.