Buffalo mass shooter/Twitter screengrab On Saturday, a horrific act of terrorism was committed in Buffalo, New York. An 18-year-old gunman, Payton S. Gendron, is charged with opening fire on supermarket shoppers in a predominantly black neighborhood, killing 10 and wounding three. (All but two of the victims were black.) Gendron, who left a record of careful planning right down to outfitting himself in tactical gear and body armor, penned a “manifesto” in which he talks about white people in America being “replaced” by nonwhites.