He should be back in his house in Lanilor Lane (along with his rescued girlfriend). It's the house with several people living there - including the guy that tried to unleash the undead monster on the guard. Just follow the trail of food back from where the undead monster is caged, and it should lead you straight to the door.
I let him keep his finger, so it's possible that he might be somewhere else if you did the quest the other way.
