We live in buildings separated by a street and I can see his window. He used to be there all the time - I'd see him pretty much every day. Then, about 1.5 months ago, I noticed that the light was always on and the window was always open and he wasn't there. And it's been like that ever since. Window hasn't moved (regardless of weather). The lights got turned off a week ago - probably an unpaid bill. I think he's in there dead somewhere. And on-one has noticed because the open window would lessen any smell.