Angel, I agree with everyone else. It was an ACCIDENT. You wouldn't have hit the dog, if you could have helped it! There was nothing you could have done. It ran out in front of you. You, yourself, could have been hurt. There was traffic out and I am familiar with the high speed roads in AZ. That woman was just emotional. She doesn't know how much you love animals. You are not at fault here. Where were the dog's owners?
Take care!
Sue