I intended for both characters to be a part of PRIES. The agent actually would probably work better if he was of foreign origin; being a rogue is all the more reason to flee to the US. The vampire would have been brought on after the agent found him preying on criminals and such, and he's more or less on their leash. Though if you still think that he would be a sort of kill on sight scenario, well, that's why I have two options.