WTF was the purpose of that?
What did the legal team say was the claim associated with the pictures?
The deice broadcasting the SSID could be a camera, and could still be snapping pics and storing them for the perp to retrieve when they drive by.
You have their name and info in case another trip to the courthouse is necessary?
They could also be "squatting" nearby, perhaps on a neighbor's property.
I agree, there are tools available designed to root out "rouge" wireless and network equipment.
Not sure if it's applicable to your situation but the last one I used was "Wireshark", and even though I used it "on the wire", I believe it is wireless capable.
That's been a decade ago, though.