Maybe the little girl is giving the only name she knows. If the child has never been registered, then whoever was looking after her has probably never applied for the child tax credit .. then probably has never submitted an income tax form.
I wonder how the mother and child made it to Brandon. Did they hitchhike? Did she have money to ride a Greyhound? Did she escape from a house right in Brandon, like Amanda Berry?
I'm terribly curious, but I have a feeling that as soon as the police figure out who she is, we won't hear another word about it.