[user104658]

I personall would never even consider living with a complete stranger. Not without locking (secure, heavy) locking doors. I actually thought that was a legal requirement in multiple occupancy houses these days? I know it was in my uni shared house, and that was with friends.

Also if it's any comfort to those worrie about him being left like that for so long: with a head injury like that, it's very unlikely he was conscious at any point. He probably went to sleep and woke up in hospital. Which is horrific in its' own way, I suppose... would you ever go to sleep feeling safe and secure again? Or always with that memory of something horrific happening when completely vulnerable and defenseless?