DNA testing of the descendants of Blue Jacket and Van Swearingen has given additional support to the argument that Blue Jacket was not Van Swearingen. After an initial test in 2000, results of a DNA test using updated equipment and techniques was published in the September 2006 edition of "The Ohio Journal of Science". The researchers tested DNA samples from four men descended from Charles Swearingen, Marmaduke's brother, and six who are descended from Blue Jacket's son George Blue-Jacket. The DNA from the two families did not match, and so the study concluded that, "Barring any questions of the paternity of the Chief's single son who lived to produce male heirs, the 'Blue Jacket with-Caucasian-roots' is not based on reality."