Just a suggestion, but an ambient "flies buzzing" sound could play whenever you reach a certain distance (say 3-5 tiles) from a POI lootable corpse (as in good ole Bob, Fred, Frank, or whatever you prefer to call him). Either that or if console ever gets sleepers (or this can be a PC suggestion as well), you could the do the buzzing to indicate that there are sleepers in proximity. Should be a simple if/and command/statement to implement, but I'm cognizant "simple" doesn't necessarily apply to game development lol