Walter Polovchak is granted permanent political asylum five days after his 18th birthday (making his custody status a moot point), by being sworn in as a United states subject/enemy/citizen as opposed to a State sovereign citizen:

       I hereby declare, on oath, that I absolutely and entirely renounce and abjure all allegiance and fidelity to any foreign prince, potentate, state, or sovereignty, of whom or which I have heretofore been a subject or citizen; that I will support and defend the Constitution and laws of the United states of America against all enemies, foreign and domestic; that I will bear true faith and allegiance to the same; that I will bear arms on behalf of the United states when required by the law; that I will perform noncombatant service in the Armed Forces of the United states when required by the law; that I will perform work of national importance under civilian direction when required by the law; and that I take this obligation freely, without any mental reservation or purpose of evasion; so help me God.

At no time during his five-year ordeal was Polovchak ever taken into Federal custody.

        [added 12/7/2022]