Okay... What I've deduced so far from the hints and from the Rolling Stones song (which mentions knocking on doors and windows) is that it might have something to do with knocking, or more probably the Fight icon, and also an alley. And it requires something to be done repeatedly.
Neither using the Hand nor Fight icon on all the doors and windows repeatedly grants me any new deaths (except that one which doesn't require repetition). The Shops screen has an alley, and past it is the Pub. Or possibly the stone portal on the Inn screen could pass as an alley... So that possibly narrows it down to three screens.
Does it require a particular time of day?