My mom was telling me more info about that attack. I don't know the fate of the dog, but I know more about the situation.
The Mail Lady said that the reason the dog went after her was because it was just defending its territory. She said that Mail people have to be very careful because when they go up to a house, they can suprise dogs, and a suprised dogs first instinct is to defend its territory (a.k.a. Bite). She said that the bite was her fault because she failed to "anounce" that she was there, so the dog became defensive. The dog chased after her while the whole intire family was outside trying to stop it. It went to bite her face, but she threw her arm up, so it bit her arm instead. The whole family was outside trying to get it, and they finally got it off of her. The Mail Lady doesn't want the dog destroyed and didn't pin any of it on the dog being a Pit Bull.
They also interviewed another Mail dude and he said that he was never attacked by a dog because he makes sure he makes lots of noise when he comes to diliver the mail, so the dogs know he is there. He said the only animal he was attacked by was a cat, and he said, "You try getting one of those things off of you!" lol