 After accepting the GOP nomination, former President Trump returns to the campaign trail tomorrow, one week after the assassination attempt. Meantime, authorities are learning more about the shooter. On the phone of the man who police say carried out the assassination attempt, 20-year-old Thomas Crooks. According to sources, he had images of Trump, Biden, FBI Director Christopher Wray, and Attorney General Merrick Garland and other public figures. Sources tell ABC News it's not yet clear why.