The DNA testing that Dr. Rick Kettles did at the
Descendants of The Five Civilized Tribes Convention in Norman, Ok (2004) is included in the book, "DNA USA", by Bryan Sykes. If you were a participant, you may want this book in your home.
Not all Black Americans are direct descendants of Africans, because of exploration, migration and slavery. They should be considered people of mixed ancestry. Try researching other racial groups in your DNA.
Bryan Sykes is a pioneer in the field of DNA, and is a professor of human genetics at Oxford University, UK.