Thomas Matthew Crooks Had Photos, Searched Kate Middleton

As this outlet previously reported, the ongoing investigation has revealed startling details about Crooks on the day of the assassination attempt.

Crooks initially raised red flags when he was processed through security with a rangefinder, a device commonly used in long-range shooting to identify a target. Because he did not have a weapon on him, he passed through security, though officials noted to keep an eye on him.

Later, attendees notified officials when he was spotted scaling a nearby building — and chilling footage taken from the rally showed him lurking outside a secured area about an hour before shots rang out.