Rolla Charles Payne died in 15 October of 1968 Probate records iirc are not in the county he is buried in but where he lived The material should be in the link sent earlier.
While you at it see if you can find registration of the family trust. May be under Madelyn’s name as that’s what was listed on his taxes a couple of years back
You go for it. Several others have and failed to get the probate records
You are assuming that there were probate records. So far, I’ve seen no evidence of him ever having much money.