SureAI

The following is probably spoilers so I'll throw in a spoiler warning because I can't seem to get the thing to work:

I'm having trouble with the last mission given to you by Chert. After killing Aryl, he tells you to go kill the leader of the Forest Guard and bring back his amulet as proof. The problem is, I was attacked by half of the Forest Guard after completing the previous mission (a failed infiltration), and already looted most of their corpses. I have not found any amulets and I fear the quest may be broken. I do not remember the name of the NPC I am supposed to kill, either, so... Yeah

EDIT:
I found a solution myself not long after posting this. Nevermind.