Police say bystander pursued gunman into Oregon school

Retired FBI supervisory agent James Gagliano joins 'America's Newsroom' to discuss the shooting at Silver Rail Elementary School in Bend, Oregon.

Breaking news unfolds in Bend, Oregon, where a shooting at Silver Rail Elementary School left victims dead. Superintendent Steven Cook gives an emotional update, while Police Chief Mike Krantz details how an armed bystander stopped the teenage gunman armed with a pump-action shotgun. Retired FBI Supervisory Agent James Gagliano joins Dana Perino to analyze the active shooter response timeline and safety protocols.