I think something similar happened go some youtuber (google Tech lead guy on youtube) where his wife who is Japanese took their (I think American) child to Japan and now he cannot even see his child.
How can a parent take a kid out of the country without the consent of the other parent without it being categorized as kidnapping. Being that the kid is an American citizen can't the U.S. system get Japan to send this kid back(if the mother is only Japanese and not the kid). Didn't America extradite the Americans involved in Ghosen's escape? So they should have agreements this such legal matters to no?
P.s. I really didn't agree with American extraditing it's citizen in Goshen's case.