About "Trail Continues" quest for Elves

[jeff9569]

I've done this quest for fifth time right now, but I can't seem to catch this elf traitor. I failed the mission first time because I killed the traitor rather than "capturing" him.

I am guessing that the red X mark on the map is the position of the traitor, but when I get there with my troops hes not there. Even when I go there with just my hero there's no unit near that red X.

I have been just killing all the ogres on the map, and the quest stopped giving me that guide thingy on the top middle of the screen.

How can I finish this quest?

I am sorry for posing so much on the forum, but I really want to get into the game since it is quite interesting.