Check the 1860 and 1870 census records, Prairie County Arkansas for David Guess. Jackson Guess is listed in the household for both of those years. This could very well be his family.
Ever since I learned that my gr-grandfather, the brother of Mary Lynch McRae, was the one who killed Mr. Guess, I've been trying to learn more about the case and the families involved.
Don't hold it against me, please! ;-)