To be fair: there's a serious weakness in airport murder scene. Unless Rocco got away clean (a near-impossibility, IMO), the cops would have linked him to Michael sooner rather than later. Rocco appeared in the FBI chart at the Senate hearing as a caporegime. How would Michael--so recently accused of being a top organized crime figure--have explained that?
Perhaps he wouldn't have to explain it at all. "What do I know about the private activities of my waiter?"
