That's tough situation. I hope your sister's family gets the help they need.
Maybe someone at the following could help.
-The Ohio Legal Rights Service (OLRS) is an independent state agency and the federally and state designated Protection and Advocacy (P&A) system and Client Assistance Program for people with disabilities in the State of Ohio.http://olrs.ohio.gov/ASP/HomePage.asp
The Arc of Ohio works to create a world where children and adults with mental retardation and developmental disabilities have and enjoy equal rights and opportunities.http://www.thearcofohio.org/