Vengeance of some kind could be a motive, but after a moment’s thought, I decided that greed opened up the field to more possibilities. Greed is a nice, sterile motivation. If the money’s right, you don’t need to know someone to take advantage of them. You don’t have to hate them, or love them, or be related to them. You don’t even have to know who they are. You just have to want money more than you want them to keep on breathing, and if history is any indicator, that isn’t a terribly uncommon frame of mind.
