Back to Crazy, Just Like Normal

Well the first friday of the school year was nothing if not chaotic. Here I was, getting comfortable in my advanced classes and my relatively well-behaved children thinking this year would be much different than last. Man was I wrong. I was walking my 4th period to their next class (all 35 of them...) and we turned the corner and accidently walked right into battle. There were four other classes in the hallway, all of which had lost control. One girl was being held against the wall by two grown men, kicking and screaming, "I will fucking kill her! Get the fuck off me! I will kill her!" (I found out later some girl had pushed against her in the hallway.) Closer to my class was another teacher holding back a boy, who proceeded to punch the teacher in the face. The teacher then had him on the ground with his knee in the boy's neck saying, "You just assaulted me son." and the boy was screaming, "Don't fucking touch me!" My kids had, of course, gotten out of line and ran up to see what was happening. There was pushing to get closer, and then other small fights starting breaking out because of the shoving to see the student/teacher fights. It took us about 20 minutes to get everybody in the classroom and somewhat settled.
Later on, the girl who had been screaming (J)was walking the hallway. I saw her, and I saw the police officer following her about 10 feet behind. About 20 minutes after that, I saw her again. I called her into my room and talked to her for about a minute or two. The police officer was nowhere to be found. After she had left, I saw the police officer again and told him she had been in my room. He said, "I can't find her. If you see her again, try to keep her in the room." So, my next period class showed up. One of my good students sits near the door, and I told her if she saw me talking to J, she should just get up and go get the principal or the police officer. Sure enough, J came back a few minutes later. I stood in the hallway and spoke with her (You know, what's wrong, are you okay, what happened, all that...) and the principal came and got her. Well, not 30 minutes later, she was walking the hallways alone again. How can I teach when everyone knows this crazy girl is walking the hallway?

Unrelated but also notable:
Part of our bullshit discipline code is to have as many behavior interventions as possible before writing an office referral. Well, we have 2 boys who need a little bit of a talking to, so they know we're watching their behavior. I went to get them from band so that we could all talk to them together as a team. (Me, and 3 other teachers meet daily) As I'm walking with them down the hallway, the principal stops me, and tells me that I can't take students out of class. I tell her they are going to a student/teacher meeting which is part of her discipline code. Her voice raises and she tells me that I will have to find another time to meet, because I will not be taking them out of class. My voice raises and I inform her that they need to be spoken with about their behavior with all of their teachers present, and I am taking them out of BAND for about 20 minutes. By this point, we are both yelling, and it ends with me throwing up my hands, saying whatever, and listening to her shouting at me as I walk down the stairwell.
In my three years working for her, she has never learned that you don't talk to teachers like you talk to naughty students, especially not in front of said students. I would totally lose all respect from them if I meekly accepted her tantrums. They respect me more when I stand up for myself, so that is what I have to do. She eventually gets over it and pretends like it never happened. I'd like to think that upon reflection, she realizes it was the wrong thing to do and dismisses it.