They knew about the student had a gun long before the shooting took place. School Administrators did nothing.
Tin Foil Hat Conclusion: They wanted the shooting to happen because of an anti-gun or anti-white narrative.
Reasonable Conclusion: They were afraid to pull a minority student aside for fear of being labeled "rayciss"
That would somewhat be in line with the pun but it is too long. My username is a play on my last name.