As I tried to explain in my wall of troll, you can easily track and kill someone pretty much anywhere in the world with less than a thousand or so USD. Unless you hire someone for the job then it gets expensive. How the hell did it take half a year? Heck, I can do it in a few days. Then again maybe he did not have the money for that. For favorite example of such an easy thing is found in the movie Jay and Silent Bob Strike Back:
