If that's the case than no point phoning the cops next time there is a mass shooting and don't lock children and teachers in the school trapping them and telling them to sit still so they are sitting ducks for the mass shooter. Teachers might as well be armed in order to shoot the mass shooter and kids can run out of the school in every which direction. The mass shooter can't shoot them all if they are continually moving in every which direction. None of this lock up kids and unarmed teachers bullshit and sit still and make it easier for the mass shooter to shoot people.