In this case it is presumed that you both had an oral agreement, which will is equally binding on both parties.You should lodge a police complaint against the tenant & serve him a legal notice to vacate as he has demonstrated ill faith & bad intentions and is now a persona non-grata at your premises.Hope you are able to resolve the matter fast.By the way, If you had observed the law and drawn out a proper legal rental agreement & also done the Tenant Verification formalities, things would have been more favourable for you.