Where is Haggar?

[Shankbon]

I got the Slay Haggar quest from the Ice Queen, went to Frost Giant Jarl Caves, but Haggar is nowhere to be found on the sixth level of the dungeon. I even mined all the walls and walked around trying to find him. What gives? Why won't he spawn?

Playing a Dwarven Weaponsmith at the moment, my most successful character so far at level 32, woohoo!