I just wanted to stop in to give some serious props to bettagirl. I know its frustrating, but I am so impressed with your tenacity- just like a pit ;-0
Even if you get no where with the dog pound, you're here, and your bringing attention to the issue of homeless pets and pit bulls specifically. Don't give up.
Even if this dog is lost, your efforts are not in vain. Someone else will see all your posts, will get interested, will research the breed, and even if they can't get to this exact dog in this exact city, they will adopt one you never hear about from their own local shelter. You won't find out that it happened, but you helped make it happen and somewhere out there a life will have been saved because of your efforts.