The Highland Park gunman who killed seven people at a July 4 parade previously posted gaming videos online where he shot at people from rooftops. The eerie videos show 21-year-old Robert Crimo's gaming avatar standing on rooftops and shooting down his opponents in a game of Call of Duty. This came before Crimo himself stood on a rooftop disguised in women's clothing and opened fire 'sniper-style' at the crowd during the Independence Day parade in Highland Park, Illinois. Crimo killed seven people with his Smith & Wesson rifle and has been charged with seven counts of first-degree murder with dozens...