So, the helicopter video was taken AFTER the police had already been on the roof. The ladders were probably placed by them to access the roof (in another video a SWAT member is carrying a folding ladder as the State Police approached the building immediately after the shooting). I doubt the ladders have anything to do with the shooter (news reports said he had bought a 5' ladder, but it was not found on the scene.) There are several locations around the buildings where he could have climbed up without a ladder.
CNN reported @ 1:06 https://www.youtube.com/watch?v=CEDtxPdJ6-8 that the shooter climbed up an AC unit in one of the courtyards in the building complex. Makes sense to me, I spotted those units several days ago.
Update: The ladder(s) visible from the helicopter video were probably not there BEFORE the shooting. In a video before the shooting https://rumble.com/v573obu-different-angles-of-attempted-trump-assassination.html , you see a couple of police cars in the parking lot. In the helicopter video https://news.sky.com/video/trump-shooting-gunman-identified-as-video-shows-body-and-rifle-on-roof-13177746 , you see more cars in the lot and one parked on the grass in front of the building.
So, the helicopter video was taken AFTER the police had already been on the roof. The ladders were probably placed by them to access the roof (in another video a SWAT member is carrying a folding ladder as the State Police approached the building immediately after the shooting). I doubt the ladders have anything to do with the shooter (news reports said he had bought a 5' ladder, but it was not found on the scene.) There are several locations around the buildings where he could have climbed up without a ladder.
CNN reported @ 1:06 https://www.youtube.com/watch?v=CEDtxPdJ6-8 that the shooter climbed up an AC unit in one of the courtyards in the building complex. Makes sense to me, I spotted those units several days ago.