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Thank you for your reply.
1) Is there a case, yes it is for breach of lease at least. Since the landlord warrants the premises is habitable and what you describe is not habitable. Furthermore, it could be abuse of the disabled based on his conduct and the fact he is taking advantage of a disabled adult.
2) So this is a civil suit for breach of contract and abuse of the disabled. Secondly, Adult Protective Services needs to be contacted and a complaint filed with them. Third, contact the local building inspector because it sounds as though there are building code violations that need to be cited and they will come out and cite the landlord for those violations. Congress, the president, the governor or whatever politician do not get involved in these matters, save your time. Go to Adult Protection, the Building Inspector and get the person a local civil attorney from legal aid and let them sue in state court against the landlord.