By Colin Egan On a late May day, many parents at the Robb Elementary School in Uvalde, Texas were no doubt making plans for their children’s summer vacation, which was scheduled to begin in just a few days. But by that evening, 19 families whose sons and daughters were not among those already accounted for, were living through the unspeakable agony of having to give DNA samples and wait to be officially told what was already all too apparent – that their grade school child had been ruthlessly murdered by a madman who had gone to their school carrying an assault rifle with the intent of killing…