Alejandra López Pardo, of 11 years old. Kidnapped by her mother and spanish father's custody. NEED HELP.

I'm Alejandra's father, José Javier López Clark. I'm the owner of the custody since the mother went away from Spain when Alejandra was 3 years old. She didn't want to know anything about her child until last year. On 2012's summer, the child was with her mother in London, and without sanction the mother kidnapped her. I KNEW IT ON FACEBOOK !! I believe that at the moment they stay in USA. I need help because I don't know anything about my child and I'm so worried. This fact is denounced in Spain but the formalities are so slowly. We're a desperate family to know some of our girl. I don't know about her healthy, and if she is going to school, in fact, is probably that they are now ilegally there.