If it was a stalker, then... well, then it's clear that everything is pointless. But if not, then there must be something? He sat on a bench, saw that the owner of Fenhel had forgotten to lock the door, went in, and did his dirty deed... Even madmen should have some logic. Again, if the door was locked, how did he get in?
In general, pretending to be on a walk, she tries to answer such questions, successfully or not.