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Dont know the path or exactly how the shootings occurred. Where were you when you got that phone call and your heart had to have dropped . So today has baeen we last our footage there. That was the superintendent going through and taking questions there for a few minutes. Let me go down to our nbc correspondent who has been on the scene for the last few hour, Tammy Leitner. What codo you feel like you kno factually and what are some of the Unanswered Questions youre trying to get answers to . Re...

Trying to piece all these things together. we talked to one parent who was on the phone with her son speaking to her 14-year-old son, a freshman, for the first time and he told police that on social media he had seen something that he thought was important enough to tell them and it said today was purge day. whether that had anything to do with the school shooting or not, he thought it was important enough to tell police, but that is obviously something they will be looking at. >> tammy leitner ...