What an awful situation. Kids are animals these days; even as young as the second grade.
An old next-door neighbor of mine was a first grade teacher. One day, as she was sitting down at her desk, one of her “students” pulled her chair out from under her. When she fell, she hit the back of her head on the concrete wall causing a concussion. A few days later his (single)mother was on the playground bragging and laughing about it...
This was 10 years ago in a west Atlanta suburb.