My question involves landlord-tenant law in the State of: Ohio.

If you look at my posting history, you'll catch a glimpse of the myriad of shit that my now former roommate/stepbrother has caused me. This is the latest stunt:

I renewed my lease for June 1, 2012-May 31, 2013. The previous lease in both of our names ended on May 31, 2012. I told him in mid-April that he needed to be gone by 11:59pm on the 31st when his status as a lessee officially expired, to which he agreed. Roommate has been a complete disaster, owes me $600+ for bills I had to cover, etc. and on the 31st he got his clothes and some personal items out of the house but left a large amount of property behind. Since then he will not respond to my numerous requests for him to return his keys, and also gave me permission to put his belongings outside and that he will retrieve them at some point. I live in the middle of the ghetto so me putting his things outside would not be in his best interest, but I really don't care anymore. My landlord pretty much refuses to get involved, which is understandable, but since I don't own the house I'm not sure what (if any) responsibilities and/or liabilities I have at this point with regards to ex-roommate/stepbrother's property. Can I give his stuff away? Can I sell it? Can I throw it off the side of a mountain? And, if I do put it outside, am I responsible for whatever could potentially happen to it out there?