I think it is worse than that. I don't think Greer is in collusion with Michael. I think Greer has his own mind made up that Terri's life is not worth anything, and nothing will sway his opinion. I am afraid his rulings are based upon his own skewed beliefs in this case and not ruled by law or fact.
Yes, that's the fourth option. He sure does have it in for her, doesn't he?