"As a martyr, he never said otherwise. Maybe he blamed himself or was told to keep quiet, but the fact remains that he wasn't exonerated until after his death, more than a decade after the fact." Sebastian believes that the truth is a mix of the two: Sirius blamed himself and was gently encouraged to accept the blame because it put a neat cap on the war.

"And, you asked how the spell rebounded. It..., a witch's last act, especially when it's borne out of powerful emotion, it can do almost anything."