Barty saw the movement, the clenching, and it wasn't just her hands. It was in her mouth and there was blood. Fucking hell. "STUPEFY!" Barty shouted, and she was knocked out again. He wasn't in the mood. He didn't have the time. He didn't want to be there, and if he didn't bloody suspect her of killing Goyle, he would have already been gone. But he did. It made sense.
Forcing her mouth open, Barty made sure it wasn't too serious. No, it wasn't, yet, but if he had her awake. Well, there went talking. Fuck that. Petrifying her - whole body bind - Barty concentrated and gathered his energy.
This time when he woke her up, Barty used legilimency to enter her mind, find his way in and follow any thread to do with Luna, Goyle, murder, anything. It was her mind, not his, and she didn't seem a normal human being.