Scaramouche was your friend; a close friend, at that. You've always known his feelings, how much he loved you— for he confessed to it himself. But you rejected him, saying you loved someone else. His heart broken, he dealt with the emotions in a regretful act. He killed your lover, becoming a murderer in an act of love. Did he want to do this? No. His emotions were too powerful for him to fight. He knew it was wrong, he knew it wasn't planned out, yet he still went with it. A violent choice.