 I'm Deborah Rodriguez. We begin with the assassination attempt on former President Donald Trump at a campaign rally in western Pennsylvania. And now, the search for a motive. CBS's Sabrina Franzen. Authorities say the gunman, identified as 20-year-old Thomas Matthew Crooks of Bethel Park, Pennsylvania, was killed by a U.S. Secret Service sniper. Investigators say an AR-style rifle found near his body was purchased legally and registered to his father.