That is known as de novo review. The court is not allowed to form an opinion or decide the case based on anything but the evidence produced at the hearing.
At the hearing, you will be allowed to introduce admissible evidence. That is usually your first hand testimony, or any other witnesses you have. Documents are often hearsay and may not be admissible unless the mother doesn't object.
You should consult an attorney and it may be advisable to have one represent you at any hearing to assure you submit the best case.
Answered on Jan 16th, 2013 at 11:34 AM