You will not get a federal court to get involved. The US. District Court will not issue orders to a Colorado state court. The only custody cases that federal courts get involved with are international cases filed under the Hague Convention. In the American system, the federal court has no power to issue a writ ordering a state court to rule in a certain way in a custody case. They certainly will not do so on an expedited basis.
If you can establish parental kidnapping, you can talk to the FBI. They do have the authority to enforce and prosecute such crimes in federal court. You should also consider hiring an attorney to assist you.
You can reach Harkess & Salter LLC at (303) 531-5380 or info@Harkess-Salter.com. Stephen Harkess is an attorney licensed in the state and federal courts of Colorado. This answer is for general information only and does not create an attorney client relationship between Stephen Harkess or Harkess & Salter LLC and any person. You should schedule a consultation with an attorney to discuss the specifics of your legal issues.