The claim was that Thomas Jefferson was proven to be the father. That claim was false. You can believe whatever you chose, but several candidates had the right DNA, the opportunity, and knew the mother.
Tom Hemmings is buried right here in the Leavenworth National Cemetery. Exhumation might provide additional evidence, but this has not been allowed.
No one had the high degree of access that Thomas Jefferson had. And no one else freed those white slates saves for Thomas Jefferson.
His brother only visited on occasion and after he remarried he was rarely at Montecillo. But Sally’s white red headed babies continued to come.