He no longer needs an alibi, he's like OJ he got away with it and no longer needs to concern himself with consequences. Actually, he's even worse than OJ in one regard, Schiavo killed his wife while the entire world watched and many of them applauded him for it.
So he may think. He sees himself, justly enough, as under the protection of the one-track media. But the media can be a fickle mistress. They can turn on you in an instant. He hasn't learned that part yet.
Meanwhile, he has no alibi in the court of history. That court is in session even now, and will be hearing the evidence centuries after his media shills and the rest of us are gone. (People do not forget great injustices.) In the court of history, Michael is literally damned forever. His only way out is repentance and confession.
That's his only way out before God, too, needless to say.