Thomas Matthew Crooks, the 20-year-old who attempted to assassinate former President Donald Trump at a Pennsylvania rally, researched mass shooter Ethan Crumbley before the attack. Crooks used a drone to scout the rally site and flew it on a programmed flight path on the day of the event, raising serious questions about the Secret Service's security measures. Investigators found Crooks' phone activity included searches for mass shooters, major depressive disorder, and pornography, which was his last search before the attack. FBI technicians are still examining his electronic devices to determine his motive, though no clear political motivations or psychiatric disorders have been identified. The incident has prompted calls for the resignation of Secret Service Director Kimberly Cheatle and a House task force to investigate the security failures. Crooks wounded Trump's ear, killed one attendee, and injured two others before being shot by a Secret Service sniper.