James Wilburn was sitting in the second row of Theater 9 after midnight, when the emergency door to his right opened and a man entered.
“He was dressed in black,” Wilburn said, “Wearing a flack jacket and a gas mask.”
The man was carrying a shotgun and had a rifle strapped to his back, Wilburn said. Then the man dropped a canister to the floor and a noxious gas spewed out. He raised the shotgun and repeatedly fired toward the back of the theater.
Twelve people were killed and dozens more injured. A 24-year-old suspect is in custody.