If you rent a room out to a friend and the understanding is that they'd be here for at least 2 months@ $600 a month. Then you come home after being away from home for only a few hours and them only living with you for a week, and their gone and their stuff is gone and you had NO clue they were moving out that afternoon. Do you return all or any of the $600 they had given You?
There is more to the story if interested.