Please tell me you're joking here. Please.
If not, let's get into it.
First, if you don't want a criminal record, you don't do criminal shit. Doctors get their licenses and work taken away for MUCH less than violent assault. Especially here in the UK, where doctors can get away with very little. There is a whole lot of accountability thanks to NICE and NHS governing bodies.
Second, she's a grown woman. She accepted the alcohol and drugs. If someone else instigated the fight, that would have been brought up in the court proceedings. But it hasn't. It sounds unprovoked here on the part of the boyfriend. We go by the evidence given, and you making up hypotheticals is useless and comes across as a blind defence of her until new information is brought up that supports your case.
Third, "tiny sexy mistake"? WTF are you saying?! What do you mean by these three words? You're calling someone stabbing a person in the leg which could've been fatal (considering the femoral artery is right there and is one the largest arteries in the body) not only a "tiny" mistake but also a "sexy" one? What does that even mean, how can someone being stabbed and violently assaulted be considered "sexy"? What was the purpose of your post of putting up a picture of her, wherever you found it from? To get more sympathy? To show she's pretty?