ALBUQUERQUE, N.M. (AP) — University of New Mexico law professor Sherri Burr learned through historical research and DNA testing that she is a black descendant of Aaron Burr, the third vice president of the United States. Burr is known for fatally wounding Alexander Hamilton in a duel. Sherri Burr’s work was recently recognized by the Aaron Burr Association, has been included in one published and one forthcoming book.