OK, so if NOBODY other than the shooter was armed, ya aint got time to get to that window, infact i bet he will see ya running and shoot ya in the back.
So your solution there is, change nothing, throw your hands up and say ahh fuck not again.
Ask libby about how it works in schools with known troubled students. They are not dealt with equally when they mess up with in school. If they are known to have anger issues, and get into fights, if its known “on their file” they do not get the same punishment that nice boy Nick who got into a little scuffle on the courts. Nick gets suspended, always pissed off Paul gets armature in school social psych help, which goes in one ear and out the other.
Every school has “special classes”. Those kids did have legal defects, and alot of them were violent. Next time ya talk to my mom, ask her about it. She worked with them, and knows the teachers in those classes very well.