Not only is Kimberly Cheatle complicit in an assassination attempt, the other Secret Service agents had to be in on it as well, because when the agents were settings up their security detail all around the rally area and had snipers stationed on rooftops, any security minded agent would've spoke up and pointed out the clearest location on the rooftop is unsecured and someone told him "Don't worry, we've got it covered". All of the paperwork, processes and every step has to be signed off by superiors.