Thomas Matthew Crooks, who attempted to assassinate former President Donald Trump, used a drone for reconnaissance over the rally site in Butler, Pennsylvania, hours before the attack. Investigations revealed that Crooks flew the drone on a programmed flight path to scout potential shooting locations. Crooks was found with a drone, ladder, and backpack, indicating extensive planning. The attack resulted in the death of former fire chief Corey Comperatore and injuries to Trump and two rally-goers. Despite being identified as suspicious before the shooting, Crooks managed to fire six rounds before being killed by a Secret Service sniper. Authorities are still searching for a motive as security lapses are scrutinized amid increased protection measures for upcoming rallies.