Ex FBI agent: ‘Lessons to be learned’ to prevent shooting tragedies

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Don Borelli, a former assistant special agent with the FBI, tells TODAY’s Savannah Guthrie that the main priorities in the wake of the Oregon college shootings on Thursday should be to determine the shooter’s motive and how he got his weapons. He said “we have lots of people out there who are mentally ill” and millions of weapons unaccounted for; ”It’s a very difficult situation.”