They could have attacked a healed target. But now that I do think about it, I agree that she should claim. Flower brought up how she received the duel notification at the start of the night which I forgot about. And so she's cleared from not being mafia's killer. That leaves me, Tris, and a potential doctor protection we have no idea about.
If you guys would like me to claim, I don't mind. I know I'm town so I'm definitely looking at Tris right now to be mafia's killer.