I heard that the building that the shooter climbed up on the roof was the “command post” for the local cops. Believe it or not !?! Still wondring about inside help ?
They saw dude with range finder, but he “disappeared”.
Why We’ll Never Know What Really Happened in Butler, PA
https://www.unz.com/rpaul/why-well-never-know-what-really-happened-in-butler-pa/