A federal criminal defense attorney exists to provide legal assistance to people who are facing criminal charges (or potential charges) in federal court.  Your attorney’s loyalty is to you and to you alone.
The attorney that you hire for your case should be experienced in defending people charged with the commission of federal crimes.  Your attorney should defend you to the fullest extent allowed by law.  Your attorney should be able to provide you with answers to your legal questions and to tell you how the law applies to your case.