Shooting at Los Angeles middle school, 12 year old girl is in custody

While tragic you post is somewhat misleading.
They are defining any shooting on school property as a school shooting.

https://hellogiggles.com/news/school-shootings-2018/

People aren't just walking in and shooting up classrooms.

Here's my biased prediction, which I hope I'm wrong: very little, if anything will be done. Some sexual misconduct (whatever that means) will be alleged against the male victims, followed by an outpour of support for the shooter. Followed by a lenient sentence, if any. Maybe I'm being cynical, but, let's find out how things will unfold.