If Eleanor McRill had a lawsuit in the 1950's to try to get money from her father estate, then those records will be in the Genesee County Probate Court.
Genesee County Probate Court 900 South Saginaw Street, Room 502 Flint, Michigan 48502 Telephone: (810) 257-3528 Fax:(810) 257-2713 8:00 a.m. to 4:00 p.m., Monday through Friday.
You might also try to contact someone from the local Genealogy Society. It might be necessary for someone to actually go to the courthouse to ask for these records. The genealogy society will have research volunteers who would be happy to help you with this.
Flint Genealogy Society PO Box 1217 Flint Michigan 48501-1217
I hope this information will be helpful to your research.