It sounds more to be in the nature of a criminal case, than a civil one. The local DA should be contacted. But then, it's Texas, and well, the DA's there in many places, might not be interested in pursuing it.
How do you figure? Plenty of high schoolers have been shipped away to military school against their wishes because their parents don't like their behavior.
And once a minor is entrusted to your care you can't just let them leave the facility whenever they want. If something happens to them the parasitic lawyers will show up with a $1 million lawsuit.
I mean if someone disapproved of their child's interracial relationship and shipped them off to a rural religious school that banned interracial relationships there is nothing anyone can do about it. And it isn't illegal. Ronald Reagan gave a speech at Bob Jones University when it had a full on ban on interracial dating in place... not sure what their policy was regarding lesbians but I can imagine.
I can't stand racism but I also realize the reality that a lot of racism is perfectly legal or at least very hard to prove in a court of law.