It does not matter what laws is passed... (look at drug laws) if a person want to kill other people, they will find a way to do it.
Oh, one more thing... just because one claim to be a christian does not mean one is a saint. Anyone can attend these private christian school as long as they have the money.
So far, they don't even know who this woman is... all they know is that she lives in the area. Might be a disgruntle employee, a mentally ill person, etc etc