I'd agree call the cops if he comes back.
I would suggest though that perhaps you have a much scarier problem than this guy. Last time you were here you had just gotten back from the ER from yet another drinking episode. I'm guessing that since you are hanging out at the liquor store buying beers you are still drinking? I'd be VERY scared about that if I were you - deathly afraid
http://www.soberrecovery.com/forums/...yesterday.html