The Secret Service Director is now blaming a ‘sloped roof’: “That building in particular has a sloped roof at its highest point. And so, you know, there's a safety factor that would be considered there that we wouldn't want to put somebody up on a sloped roof,' she told ABC News in an interview Tuesday.”

https://www.dailymail.co.uk/news/article-13639613/Secret-Service-director-wasnt-roof-gunman.html