Breaking My Heart

I love all my kids, I really do. But there are a select few (I'll say about 5) that I really feel like they're my children. I don't really consider them my "favorites" because they're sometimes troublemakers. But they are those kids that you just see something in and yet at the same time, you know they've gotten the shaft so far in life. Tavon is the sweetest boy I know, and so smart, but his mother is a drug addict and he just has this bone-deep sadness about him. Like he has already found all the ugliness of the world, and he's only 12 years old.
Another one of those children is Joe. He hasn't lived her his whole life, so he knows what "real" school is like. He told me last year that he can't learn when its loud. And when you have a new teacher (or a bad teacher...) it is generally loud and rambunctious (or out of control) in a classroom. Some of the hardcore kids from the city that DO want to learn can maintain through the chaos. But Joe is one who just can't. I tried to get him in the advanced classes last year, but they were full.
This year, after I fought, and he aced his standardized tests, he got in the advanced classes. However, our principal still hates him because he's a goofy little boy and gets in goofy little boy trouble.
Apparently, when he was 9, and living somewhere else, some kind of innappropriate sexual something happened with him and a younger child (I'm really not clear at all on what happened, the principal vaguely mentions it in a "I know, and its really important but i just can't possibly tell you" kind of way) Whenever Joe gets in trouble, the principal brings this up. What the HELL does that have to do with him talking during spanish class?
(And on a complete side note, how can you blame a CHILD for something like that? Normal nine year olds don't know about sex. If he molested somebody, HE HAS BEEN MOLESTED HIMSELF.)
So, two days ago, he got suspended for hitting someone after that person hit him. (Despite what most people think, at my school, that is relatively minor.) The other student did not get suspended. When he came back to school, the principal said he was coming out of advanced classes. (This is her form of punishment, wtf?) He has had no problems in any class besides Spanish (which is a brand new teacher). He, in fact, excels above many of his classmates within the advanced classes.
I walked into the office this morning because I saw Joe coming back from suspension. I asked him what had happened. He started to tell me, but the principal interrupted and said, "I'm taking him out of the program. He's going upstairs." I started to argue with her, because upstairs is all new teachers and a huge chaotic mess. He did nothing wrong in his classes, and suspension was his punishment (which he spent at the library by the way.) She says to me, "I have to make decisions based on what is best for the entire school. I know things that you don't know about this boy, and I have to make those decisions that benefit everyone." (She doesn't know that I know about the molestation.)
Basically, she doesn't want this "criminal" corrupting her "good" kids. HE IS A GOOD KID. A good kid that obviously has serious personal problems. Does that mean we give up on him? I have known him for two years and he has never been innapropriate in any way.
HE IS A CHILD. Aren't we there to try and help them?