I’d recommend reading this article that was linked in the AP article which has more details about the sentence and following appeals:
https://apnews.com/article/morgan-geyser-slender-man-stabbing-release-petition-09a2537704c926675c39349a45f9bfde

She did stand trial - she was sentenced.

So she was 12 when she did it, but is still a danger to others 10 years later if I’m reading correctly.
Was the psychiatric hospital meant to rehabilitate her?

Question from an outsider:
Do all bills in the states have to have a fancy acronym?
It looks like the senate is the first step, is that right? Next is the house? It’s the opposite where I am.