People are unpredictable! This case is going to shatter so many lives. Sure they'll rebuild, but those trust issues are going to remain. We never truly know anyone, not even ourselves. Things I thought I would 'never' do, or 'never' say, well, I have now. I pray my mind never goes to the point of illegal acts against another human being, or animal. But truly, we don't know.
We can put 100 people in a room and have a prepared situation occur. Each is going to react differently, respond differently, and most likely report what happened differently.
I know I couldn't be a psychologist, it would drive me crazier than I already am. I cannot predict what someone else might do. I can have statistic that say this or that, and have an idea that someone can happen, but I can't line up a group of people and predict what they'll do. It's scary!!!
With animals, you have some deviations, but for the most part, you can read their body language, know their nature, know their species behaviors, and predict what will happen. It's what makes some horse trainers appear to be so good that they can suddenly load that horse that won't load, or stop the bucking of the horse with an ill fitting saddle. It's not that they are using some magically stick, tone of voice, etc., to get the horses to obey their commands, they are good at predicting what THAT horse will do, and thus a step ahead of the horse in then changing how they ask it, or how they stand, etc., so that the horse understands, and complies. Even so, I've seen a horse that was known to be aggressive, known to attack people, and a great trainer that was then attacked by said horse, and could have easily been killed right there. His recommendation for that horse? Put it down. Even most Mustangs straight off the range would rather FLEE than FIGHT!
My prayers for all close to this case, close to the victim, close to the perp, the classmates, their families, teachers, etc.