I can't trust my brother!!

I really can't trust my brother. I just got back to the house I know he was digging through the house today. I saw furniture was move around. The house smell like cigarette. I don't even smoke in the house unbelievable. What is he doing? Is he looking for things to steal so he he could sell it for money to buy drugs with. There's really nothing in the house. I can't even trust him with my grandma meds. I know people take prescriptions drugs to get high. I know my brother took her meds before. I'm going to lock up her meds up. Why can't my brother the fuck up. It's getting really annoying I got to babysit him. He's a grown man!!!