I understand your situation completely. I hid my car key away from my addicted ex boyfriend, but he always managed to find it. Worst of all, he made copies of my house key without me knowing. However, at certain time you have to be tough and just tell him to leave and hold no responsibilities for it. I understand how frustrated it is, and if you worry about his next stop, he is always gonna find some. Someone's couch, garage, or even sleeping in the car. But until he hits rock bottom, he will not stop. Let him experience and pray for him but let him face the bottom, and maybe there is a chance to climb up the hole he digged.