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activity, because the investigation of the shooter is in high gear right now, and you may see some of these police units, the unmarked ones, especially, leaving the scene so that they can assist in the other phase, which is basically writing a biography on this shooter to get to know everything they can about him as soon as they can. >> steve moore, thank you so much, appreciate that analysis. if you are just joining us, right now, we are following a shooting in allen, texas. we know from law enforcement officials that one shooter is dead. there were earlier reports of a second shoot...

In a mall on a saturday. at places like this. and so, there are going to be teenagers, younger bystanders who will not be able to process this, maybe in a way that a more -- that an older person could. we certainly know, at least the data, of school shootings, that there's a generation that we now -- that is now known as generation lockdown, this is the generation of kids that grew up both after -- after columbine, but then, of course, sandy hook, who are used to active shooter drills. perceived the risk of guns and the likely hood that they will be in a mass shooting, is much higher than adul...