Custody for child with visitation not being utilized
I am a grandparent awarded custody with visitation given to mother. The mother hasn't seen this child in 9 weeks. She just gave birth to another little boy. I received custody via CPS and the District Attorney's office. The biological grandmother was given visitation but she hasn't seen the little boy since July of 08. Is there some way that this can be considered abandonment by mother and biological grandmother. Is there anyway I can sue for full custody?