Turning Yourself In
Turning Yourself In is a quest for level 15-30 in Western Plaguelands. It is step 63 of 63 in the Western Plaguelands storyline, the final step. The quest's turn-in marker is in Western Plaguelands at 41.9, 15.0. It rewards 3 reward items, 1 reputation reward, 5,150 experience and money. Completing it counts toward 1 achievement.
Description
So... you killed a member of the Argent Crusade, inside of Hearthglen. Usually that's not smiled upon, even in self-defense.
I recommend you come back to Mardenholde Keep, and turn yourself in to Highlord Fordring. Hopefully he will hear you out, and will be sympathetic with your situation. I hope I haven't gotten you in any trouble.
Rewards
You will be able to choose one of these rewards:
