No reaction, even from one parent who had threatened to take his children from the school, he was so fearful for their safety. He owned guns, by the way. He admitted to Waris that he did. No doubt the guns are much like the ones used when kids killed kids at other schools. From all indications, the parent who said he owned a gun and the other parents are not unusual.
Kids keep killing kids with their parents' guns.
Sometimes kids use guns they own themselves. Parents worry, they ask questions, they wonder how such things could happen. And they keep the guns.