According to the Washington Post,
Making it clear that he “would not let any of those people go,” Powell said, “I would simply move them to the United States and put them into our more federal legal system.” He said he sees no problem in detainees having the right of habeas corpus and getting their own lawyers. “Isn’t that what our system is all about?”
You don’t even have to go that far to question the slick move to locate the prison on Cuban soil, which was used as justification for the claim that it is therefore not subject to the jurisdiction of the American legal system.