I keep thinking about Nancy's hearing aids (it is referred to as "hearing aid" in the mentions we've seen).
I brought this up last night and I keep coming back to it.
Most people wear two hearing aids, not one. I would be shocked if she was only prescribed one.
It occurred to me at some point, what if she grabbed one of them to try to identify a sound outside and stuck it in her ear.
There was one found (left behind?).
What if the other one was in her ear when she was abducted.
All this leads to the following - my app has a "FIND MY" feature. Note: I've removed all identifying information.
Before I tried this experiment I had my hearing aids OUT and hadn't opened the actual app for a few days. It still showed that the last place both hearing aids were known to be was inside this house on February 9. I think you can see where I'm going with this. It's an obscure/thought idea and it would depend on a lot of things, but if there is ONE hearing aid on her body, it might provide a clue to where she was at some point.
I'm editing to add what they look like when they are disconnected (not in my ears). The app still seems to know where they are. Of note: they are fully charged so I don't know what happens if one or both would be no longer charged.