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Officers respond to active shooters. >> first responders could hear the shooting continuing, and their training, their tactic was we got to secure the perimeter and call out s.w.a.t. team. and unfortunately what happened in hindsight was that the shooting did continue. >> reporter: at columbine s.w.a.t. teams didn't enter the school until 47 minutes after the gun fire erupted. 12 students and a teacher were killed. now in active shooter training scenarios like this one many police departments instruct the first officer or officers to rush in. that means don't wait for backup, for s.w.a.t. team...

So for this officer whose very job was to confront this kind of a challenge, to sit, really, on his hands during the unfolding of virtually the whole event adds to an already terrible tragedy. i would note what van said. you've got a coach here who is willing to give his life to protect the students in his charge, and, you know, you raise the question, don, about a good -- you stop a bad guy with a gun with a good guy with a gun. that's true. i'm not sure i would put that deputy in that category, but i'm sure i would put that coach in that category, and i'm sure there is room for the discussio...

>> yeah. randi weingarten, always a pleasure. >> thanks, don. the president's tweets about the shooter, is any of that helping? we need to make sure anyone does what happened in parkland again. hey. pass please. i'm here to fix the elevator. nothing's wrong with the elevator. right. but you want to fix it. right. so who sent you? new guy. what new guy? watson.

In a plea deal and talks. shimon prokupecz reported the two developments don't mean that's other. but do the new charges make the deal more or less likely. >> well it doesn't preclude a deal from happening. it's still a real possibility. but what it does remove is a great deal of leverage that gates didn't have a lot of. remember he already had a 12-page indictment that was filed by the mueller investigative team. it's not as if he had a whole lot of bargaining chips. and mueller remains to have the most amount of leverage in the scenario. but there is or could be continuing talks. he has a ne...

That as part of the discussion. >> and they had access to a gun. >> can i add one thing to that, don, which i think is also important. we have to be very honest here. we talk about mental health usually when the shooter is a white person. we say, geez, what small kings c -- things can we do? maybe we can add a cop here, do something about mental health. a black person does this, we have to do something about this. a hispanic kid, build the wall. when a white kid does it, mental health. my problem with that is it means that we're underaddressing a section of the public that seems to be developi...