Owwwwch...

Good luck!

Maybe just consult with a lawyer and see what they have to say about your chances. It seems illogical to me that anyone of sound mind would be ok with dogs running wild in the street, but different localities have different attitudes, esspecially in rural areas where space is so much more open. In my opinion, If you have a dog it's your responsibility to keep both your dog and the public safe no matter where you live.

I feel sorry for the pup too, imagine having somebody like that for an owner!