Gamer, I'm sure your products are great, but my understanding is all links to such products, and self-promotion in general, should be restricted to the "Promotions/Press" forum.
Just saying.
This said, I agree completely with the notion that ghosts should typically arise from tragic stories. In this case, the tragedy was that the ghost was betrayed by a guy he thought was his ally. The tiny niggling detail that his ally was a priest of Norgerber, the god of murder, greed and secrets in the Pathfinder Golarion setting should have made him think twice about such an alliance, but, hey, what do you want from evil dudes?