Franklin , Tennessee - there have been several emails on this subject and one person is a bean counter (I'm guessing) because they mentioned there is nothing on the books about the purchase of these toys.
My answer would be simply this-remember those 28 million dollars that The City of Franklin spent to design a 36 million dollar building? I would say the police got a chunk of that money to spend any way they pleased and since that money is not shown on the books , any purchase would also be "not shown on the books/inventory" and this is my best guess.
My second guess is the units are borrowed from another agency. Cities like Nashville have had these for a while now.