https://chicago.cbslocal.com/2018/08...lled-pit-bull/

Police said when officers arrived at the scene, the dog charged at them. Both officers fired their guns killing the dog.
The victim was taken to the hospital where she was pronounced dead. The dog bit her throughout her body, including her neck.
Police are still investigating. It’s unclear where the dog’s owner was.
CBS 2 has confirmed the woman’s name is Karen Brown. Her nickname was “Punchie.”
My guess is the dog committed suicide by cop.