How you find a lawyer who can help with this problem depends on whether or no you can afford to pay the lawyer. If you plan to hire a lawyer, contact a lawyer referral service. Many lawyer referral services have a website that lets you search by type of case; if not, you can call them. The Cincinnati Bar Association has a referral service that covers Warren County
If you can't afford a lawyer, a legal aid organization may be able to help you. There are several legal aid organizations in the Warren County area, but not all of them handle this type of case. I found some on the Ohio Legal Services website - the first source below - which is searchable by county and will give you several in Warren County.
The second source below is CourtReference's Guide to Ohio Courts - Legal Aid and Lawyer Referral. It has links to lawyer referral and legal aid. Under the Statewide group, check the Find Free and Low-Cost Legal Assistance link for legal aid (this is the Ohio Legal Services link) for legal aid. Check the Directory of Lawyer Referral and Legal Information Services link for a list of lawyer referral services that includes contact info for the Cincinnati Bar Association.
Legal aid should be free if you qualify for low-income in the USA