Only in the same sense that it was not Old Yeller's fault that he became rabid and dangerous.
He is NOT a threat
What? Did his bloodlust become sated with nearly killing the teacher's aide and he'll be safe now?
If you watch the video of the attack, teachers watched the attack knowing they were and are restricted from touching the attacker. It was students that stopped the attack.
Public schools are places of violence and places where violence against the innocent is overlooked.
No. He said when he comes back he is going to kill her. I would take him seriously and if I were her, I would never return to this school.