How could anyone have ever felt sorry for Rolo? It was blatantly obvious that he was really, really unstable. I have always said he should have killed him sooner rather than later, rather than use him because Rolo was just that dangerous. Now, predictably, it has come to bite Lelouch in the ass, and Lelouch doesn't realize its his own damn fault.
Rolo never deserved anyones sympathy, he was an idiot, a tool, and a borderline psychopathic one. I am going to be happy when Lelouch FINALLY kills him, something long overdue.