The gunman who opened fire on the Dallas police headquarters from an armored van early Saturday morning is believed to be dead, The Washington Post reports. Authorities say a SWAT sniper shot the gunman, who identified himself as James Boulware, around 5 a.m. Saturday. Police are not approaching the van until they can confirm it's not rigged with explosives, but they sent a bomb tech robot with a camera to see if the gunman was alive.