This actually leads to a serious questioning of how certain laws would be put into affect when dealing with extra-species people. Is the girl truly at fault for overreacting and thus causing a instinctive response that the werewolf had no control over, or is it the werewolf's fault for putting himself in a situation knowing he could uncontrollably driven by his instincts to attack someone who misinterpreted the situation?

Turns out, this case was just an intentional assault masking itself as self-defense.

In the case where it truly was an instinctive response due to the other party's over-reaction, it would still fall under assault and battery law, since it's based on the notion that the attacking party is at least sentient enough to understand his/her own action. It's OK to be scared, but it's not OK to lash out even on instinct. If the attacker is truly not in control of themselves that they pose a threat to anyone in the vicinity, I suppose the person would be treated not as a human being and more like an animal.

Also, there's the definition of "over-reacting" that brings up another can of worms. What constitutes "over-reacting" and how far does that extends? Is screaming considered enough to be considered threatening to his safety?

Well, getting hit by a bystander is probably sufficient cause for a "self-defense" plea. And then we see he's trying that exact argument, complete with perjury.

Well, at first glance, it's pretty obviously the Werewolf's fault. Being in a public place during a transformation that could cause you to harm another would be considered criminal negligence, at the very least.