Good! Glad the cops made animal control do their job. Also, neighbors now don't have a legal leg to stand on since the police saw the dog loose the day after it bit somebody. Keep your pictures and your paperwork from the walk in clinic as proof that the dog broke the skin-- that matters in some jurisdictions.
Glad you've got some self-defense options around the house as well. People who let a pit bull with an aggression history run loose (or escape) are not oriented to the same reality as the rest of us and may blame you for this, even though it's not your fault. Take care, and thank you for doing the right thing.