"Research." Is the simple explanation. "It would be of use if I had more intimate knowledge of the town prior to arriving here, as well as any inclinations if this has happened before."

He spots one of the townsfolk lying in the street next to several bottles of empty drink. It seems obvious what has transpired here, but he kneels by them regardless. How to investigate further without touching them....?

"What of you? Did none of your comrades see fit to accompany you?"