See Section 2112.21 of the Ohio Revised Code for the requirements that must be met in order for an Ohio Court to have jursidiction to establish a guardianship. If his residence is in fact in Warren County, then that is likely the probate Court that you would need to file with.
All in all, you will likely need to get an attorney on board to assist you with the process and sort things out.
Best of luck.
Answered on Aug 26th, 2021 at 7:49 AM