This doesn't happen that often, but in this particular story it was blindingly clear to me what had happened, and how. Don't get me wrong: I didn't guess the backstory. I assumed that this was a crime of opportunism, but the method and the culprit are the same either way.

I don't know if I'm particularly clever this evening, or if Christie just wrote a short that was a little more obvious than most of hers. To be perfectly honest, I suspect the latter. Doesn't matter, I still enjoyed it.