You need to contact a CO medical malpratice/birth injury attorney. Your child's birth and pediatric records will need to be reviewed to determine if there is a medical malpractice against the doctor.
As I am not licensed in your state, I cannot provide you specific legal information on Colorado state law. However, since you indicate that you already sued the Dr., I would recommend that you recontact the attorney who originally brought your suit (since he will be intimately familiar with all of the details of your situation) and discuss this question with him.