[Dylflon]

Gamemaster, if John were at home, he'd be living with his parents so the house wouldn't be under the name of John Holliday, it would be under his father's name. So you might have to figure out his father's name.

Furthermore, I believe John is living on campus at college or university. So an equally fun game would be to find out what school he is attending and then finding his dorm room number.