I would believe the actual reason behind this whole affair is typical Liberalism. Liberal’s DO NOT ACCEPT RESPONSIBILITY at all. They might under specific circumstances state they do, but in actuality they always have somebody else lined up for blame.
In this case the Liberal school officials had a meeting with the police, and the prosecutor in a CYA meeting so they could dump all responsibility onto them. The Police, and the Prosecutor accepted the responsibility the school officials dodged.
The fundamental problem is that nobody actually wants responsibility, but everyone wants authority. Socialists (so-called liberals) are people who think, and all too often are able to vindicate the belief, that they will be able to evade responsibility while exercising authority. The impact on the rest of us, however, is described in the following (author unknown):
It's not my place to run the train
The whistle I can't blow.It's not my place to say how far
The train's allowed to go.It's not my place to shoot off steam
Nor even clang the bell.But let the damn thing jump the track
And see who catches hell.