Using their multi tool, they removed the fender liners (wheel well liners) from all 4 wheels, the trunk side trim (luggage compartment side trim) from both sides - all of which just has plastic push-pin scrivets (retainer clips). They broke 5 of them.
They folded down my back seats (after removing all my personal items out to the shoulder in the rain), then unbolted and removed the back seat.
I do a LOT of interstate driving, and it is not at all uncommon to see this happen.
This is not the only time I have been in situations where authority has been exceeded. My attitude is to generally be cooperative (without giving consent) as my experience has taught me that is the most painless way to go.