Speak with Commander Althea Ebonlocke in Darkshire.
If you would like to know more, you might ask Althea, she's been the one to handle the... trouble... with him of late.
Morgan Ladimore? Never heard of...
Oh, you mean Mor'Ladim! I guess you haven't heard the story?
Well, I'll give you the short version. A wandering undead calling itself Mor'Ladim has been wandering Duskwood. From what we've gathered, it appears to be the undead body of Morgan Ladimore, of whom you apparently know. He's been causing us all sorts of problems, attacking Watchmen on patrol and killing people.
You seem to be capable enough, maybe you could lay him to rest.