COLUMBIA, Mo. (KMIZ) A 20-year-old Columbia man is now charged with first-degree assault in addition to other felonies in connection with an incident Aug. 9 in which gunshots were fired in public downtown. Prosecutors added the charge against Tavan Williams-Patrick on Friday, dropping a fourth-degree assault charge. Williams-Patrick was initially charged Aug. 10, accused of firing shots near Ninth and Walnut streets in downtown Columbia. He is a…