You need to consult with your criminal defense attorney or hire one in your area that practices in that federal court to speak with the AUSA who is prosecuting the case. If served with a federal subpoena who have to respond or get counsel to make a motion to quash. You need legal advice NOW!
I am trying to give you a general answer to your question. We do not have an attorney-client relationship by this response on the avvo website. I have not been retained to represent you. I am licensed to practice law in Kentucky and in federal court in this state and the Southern District of Indiana. You need to seek legal advice from an attorney licensed to practice in your area..