"No, win, you did not. Or else I would not be inclined to help you to your new lodgings, but rather, would be making sure the school authorities did not find the body."

But everything turns out alright (ish) in the end, so.

"Perhaps you will consent, as I did, to submit yourself to a memory charm when you leave this place? So your knowledge of the future does not change the way events play out? In the interest of justice."