The werewolf curse, a legacy of the origin of werewolves, was what defined their existence. To trigger this curse, one would have to have killed someone. It does not matter whether it was a mistake or not, when once one has killed someone, your curse is automatically activated or rather triggered.

Not everyone in Packs have triggered their curse yet, like kids, teenagers, and so on, but it will happen because it was meant to happen, no matter how long it takes or how long one tries to avoid it. ...