There is nothing the police can do about a person walking a Pitt on a sidewalk. My friend had a big muscular Pitt which was so nice to walk. ( You could point to either side of you snap your fingers and he would go to that side of you.)
I got so many looks from everyone I passed by with that dog I had a big fear of Pitts from growing up, they use to chase me, they have killed 3 of my dogs as a kid, so I had a big fear of them. when I fire say this dog, I would not look him in the eye, this down was so friendly to me.But as I walked that dog, if a office came to me and asked me to take him home. I would tell him to get lost.
I am sure there are some cities that have ordnances against owning these aggressive dogs, but I am not sure about walking them in that said city.