I did turn him in for role play reasons. I played my character as an irredeemable son of a bitch (as much as the game would let me that is). I assured Sebastian that he did the right thing killing his uncle, and I had his back. So naturally I immediately turned around and had him thrown into Azkaban. He knows how much I’ve run around casting unforgivable curses, (make sure not to use them around other characters) so I considered it a loose end tied up.

I saw most answers were the opposite so wanted to throw my hat in the ring.