 And that's ABC's Mary Bruce, Washington Post law enforcement reporter and co-author of the Trump trials newsletter. Devlin Barrett reports that the shooter was outside the rally venue. What we're hearing is that the gunman apparently fired from above a roof on a rooftop from outside the what you might think of as the hard security perimeter of the event. And obviously there will be questions to answer about, well, how did a gunman get on a roof able to shoot at him?