Leave through North Camelot gates and turn left. Run past the church (which is down the hill) and you'll soon see a guard tower. Throatripper is a night spawn that you will find in that valley, usually toward the left end of it. Be careful of the Nain dwarves on the hillside - they aggro. He's just a larger wolf than the ordinary wolves roaming around and you may have to kill a few to get him to spawn.