 CBS's Charlie DeMar has the latest on the investigation into Saturday's assassination attempt on Trump in Pennsylvania. CBS News has learned that the shooter's parents attempted to contact him before the shooting. Multiple sources tell CBS News 20 minutes before shots were fired, Secret Service had been notified of a suspicious person with a rangefinder. At 6, the former president took the stage. By 6.10, the Secret Service snipers noticed something happening to Trump's right