One, it wasn't my first thought. I tried having a reasonable and completely civil conversation with her.

[Scroll down, Chris.]

And two? This is exactly the sort of thing I was talking about last time. Yes, there are some instances where killing another person is a reprehensible act, but this isn't one of them. She's endangered the lives everyone else living here, and she's done so willfully. One death - which, as you've so helpfully pointed out, isn't permanent - is an acceptable cost if it saves dozens of lives as a result.