GPS
I was just thinking the same thing. Put a small GPS receiver / cellular transmitter in the box before the bees are introduced to make their hive. The bee rustlers aren't going to tear apart the hives looking for that, and it would only need to activate once per day so a tiny battery would last pretty much forever.
Then you just pull up the Find My Bees app on your phone and tell the cops where to go!
Biting the hand that feeds IT
