Security Expert says there was no reason why the roof should not have been secured

Security Expert says that allowing the near Trump assassination to take place was either extreme incompetence or a collaborated plot. He says that there is no reason why the rooftop that was allegedly "outside of their perimeter" was not secured.
We now know it was only 150 yards from the stage and people were telling security about the shooter WAY before it even happened.
We need a full investigation immediately.
"How on earth someone in such an obvious rooftop position, with a clear line of sight to the former president how on earth they weren't picked up on by the security services how they were able to get on the roof and and and mount a rifle, in such vision and in such clear view of everyone and and and get to the stage where they can actually fire shots…It's astounding. I'll be honest with you there is something a little bit fishy about this situation because ultimately…you know when you're running the protection of a principle one of the biggest concerns that you will always have is if you're taking them into open spaces that wherever you heart have that event you want lock it down secured as much as possible. And the secret service that will be attached to President Trump should have got all of the highest positions the overviews that there would be of the event space covered. And that's not only the spaces that they themselves can then observe everybody who may be on the ground anybody who might be in the vicinity, but also on other rooftops in apartment windows, in office windows. So there's something a little bit a little bit suspicious about this. It really falls into one two areas there is either incompetence in terms of the security planning…or…collaboration or collusion In terms of enabling there to be a vacuum, a void within the security that could be potentially filled.
Apparently it was outside of their perimeter, so is that anything they can say that they couldn't have forseen?
Not really. I finding this really difficult to be a defensible position by the secret service."