If he has been captured, and if the photo is correct, he is dressed in a Ukrainian uniform.
Dressed in the Ukraine uniform, and if on their roster, no problem..he is a legal, protected combatant.
Few people even know, that when John Paul Jones (John Paul) finished birthing the United States Navy, and the American Revolutionary war was over, and after going through a "broken heart" love experience in France...went on to serve the Czar of Russia.
However, his bones now rest at our Naval Academy..at Annapolis, MD.
disappointment in France