He is "in the process" of moving his things out and I tried to ask him his plans but he will no longer talk to me. He hasn't paid rent this month. He has no money and no job. Sorta ironic that he brought boxes home this weekend and at the same time I was told he didn't pay his portion of the rent, as it's due by the 5th of each month.
I do think the car alarm thing is still a good idea as if he heard that go off I think he'd leave quickly.