 Chris Swecker used to run the FBI office in Charlotte. They're supposed to plan effectively. A potential actor like this would have a line of sight on the president within a couple hundred yards. And it turns out witnesses saw the shooter on the building and told police. We noticed the guy bear crawling up the roof, clearly see him with a rifle. That's WBT's Mark Garrison reporting. The gunman, 20-year-old Thomas Crooks, opened fire and was killed by a Secret Service sharpshooter. Today, a House committee will begin investigating