There was to be a hearing on Gwen's behavior. While it was not unbecoming for a fully licensed adult wizard to put his or her life on the line to defend a school from death eaters it was hardly responsible behavior for a student to do so.
Consequence she found, was something she didn't understand. She knew her "rush-forward and damn the consequences" attitude often got her in trouble. She had inherited that from her mother. Mix that with someone who has bravery coming out of their ears and a savior-complex and you've got a problem.
She didn't speak to her fellow students for days, which didn't matter much. None of them were really prepared to talk to her either. They hadn't seen the event as it occurred, but they had heard all too well that she had subdued thirteen death eaters single-handedly. They were amazed that there was someone with that kind of power in their school. They were even more terrified because she might very well subdue them if they angered her too much.
Dumbledore was confident that whatever Gwen had done she would not do it again, but some of the other teachers kept an especially keen eye on her. She was allowed to continue classes, but she could not participate in any extra-curricular activities until her name was cleared. Dumbledore had canceled most of them anyway. Hogwarts had come very close to being openly attacked.
Graves was in the hospital wing. Madame Pomfrey had never seen anything like it. It wasn't a coma, he was still breathing on his own. It wasn't like the living death. No, he was merely unconscious, but he would not respond to anything.
Trying to help, Gwen explained the curse the death eater had performed. "I've never heard it before, he said: Carcer Tristitia." Dumbledore and Pomfrey looked at her curiously; neither of them had heard it before either.
"My, I believe this is a newly discovered curse." Said Dumbledore fascination and terror residing tandem in his voice.