quite a while, the initial reports were that there was a fire alarm that was going off so students thought maybe we are supposed to eggs it. then there was a lockdown order so maybe they stay where we are. complete chaos. then second thing just as important, her story shows the numbers we are seeing, and i hope they don't continue to rise, the numbers of victims, that's just one number. there are also countless emotional victims out there also going to require support from law enforcement and community. just shows us how tragic these swangss are. >> we heard on the phone 17-year-old girl thinking about all that she witnessed today go to sleep tonight. julia, if i could go to you, after violent insurance dernts like this, you do hear of some warning signs. in this case we hear of troubling disturbing posts on social media. we understand this student was disciplined from the school, possibly kicked out before. there was some warnings about him. so you might say well then why wasn't he stopped?