Sherri Burr recently learned she is almost certainly related to a notorious Broadway villain.After years digging through archives and then undertaking a DNA test, the law professor – who is African American – learned she is most likely a descendant of Aaron Burr. Burr, who was white, served as America’s third vice president, but is best known for shooting dead founding father Alexander Hamilton in a 1804 duel, an episode memorisalised in Lin-Manuel Miranda’s astonishingly successful musical.