[X] Pump him for information
-[X] We're primarily trying to get info on who he paid to get left alone, that part seems relevant and like whoever he paid might've set this up. However, he's drunk, and there's no need to be rude, we'll use Light Touch if needed and gently guide the conversation in that direction rather than be impolite about it. We will also happily allow him to tell us things like where he's from and why his family moved here, whether they'd be open to trade in the future, things like that. That's all secondary to who they paid to be left alone, though.
-[X] Keep a careful eye out for when he tires of our company, make our goodbyes and get out of there before his mood shifts towards the truly unpleasant. Using Goal Tell and Lowest Limit to help with this inasmuch as they can.