I don’t know about Pennsylvania but here in Southern California many of the tilt up commercial buildings have permanent ladders affixed that are easy to lock with a regular padlock.
They’re supposed to be secured by design to keep kids and scrap thieves off the roof. Every cop knows to visually check them when they’re on patrol and drive around the back of commercial buildings. Why did neither local cops or the SS check those buildings shortly before and during the rally?
I guess it’s up to Trump supporters to check things out now.
Since this is a federal investigation, we’ll likely never hear the truth.