Why don't they make guns illegal in schools, put up some signs, and post 'security guards'? That would surely have stopped these guys from firing guns at each other, right?
Oh, you mean they had already done all of that, and the criminals still had a shootout?
Weird. It's almost like criminals aren't deterred by laws and signs, and are smart enough to evade the minimum wage, minimally trained security.
Is there nothing else the schools could do to protect the students?