Doesn't mean she's forgotten the tricks she used to get out.

So, if we're using ropes and locked rooms, we need to be judicial about how.

If we're drugging her we have to slip it to her unawares too — keep in mind that it might put suspicion on us if someone sees, and that she's likely expecting that as well. Drugging was involved in both the murders thus far.

She's already a smart girl. The monster is probably taking advantage of that.