This is a big deal. It involves legal issues and the authorities should be in the loop. (Remember, this is the second time to your knowledge that this has happened.) Since it involves legal issues, you should keep a paper trail. Everything in writing... even if contemporaneous notes of your own. Me, I'd be sending copies of the vet bill and county ordinances via registered mail. (But that's me. I'd also be discussing this with an attorney.)
The OP stated she would not be calling a behaviorist. I get it. She probably feels it would be futile. BUT... she also says her dog has suffered some behavioral changes. Uh, so... why would she not call the behaviorist on behalf of her own dog?
You're traumatized, We all understand this. But... again, I maintain that taking positive action is therapeutic.
It would be a win-win. You would be getting expert help for your dog, and would have the benefit of participating in his healing.