"Agreed," Sandy nodded, "and, if anypony is to blame, it's me. I was the one who approved him for schooling so quickly. I did not know that he had violent tendencies to this extent, though, it's likely a signifier of a history of conflict. So, Mr. Rich, I apologize. If I had known, I would have made sure that Cheerilee would have been better equipped to stop it from happening in the first place."