Ana Cristina Valladolid waited anxiously Sunday evening.
Family members regularly gathered on the weekends at a park near the Highland Farms subdivision, a Kirby neighborhood just one street over from her own home. Her son, 14-year-old Isaías Treviño, had taken off from the park with a friend to ride electric scooters.
It was something they had done dozens of times. This time, he would never return…