We've learned since the mass shooting yesterday where three 9 year-olds and three staff members were killed. The 28-year-old female shooter had a manifesto with details of school entry points & cameras --  now in the hands of authorities. And she'd also attended that school in 3rd and 4th grade -- but no motive yet. But maybe she harbored resentment about going there as a child. Dave and Debbie walk through the latest details. 

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