I suspect that there is mail piling up in behind the front door as well.
RE: homeowner dead?
In the old days when landline phones stayed on when picked up instead of quickly beeping and shutting off if you take too much time dialing there was a classic Gahan Wilson cartoon:
Two telephone company repairmen are standing inside the entrance to a house.
“There’s the problem right there. Phone’s off the hook.”
(Man has hanged himself from the ceiling and is dead with the phone cord wrapped around his neck.)