Stephen Johnson Field,
Mahon v. Justice — Opinion of the Court
“ It is obvious that such cases stand on a very different ground. It is there a question between independent nations bound by no ties of mutual obligation on the subject, and at liberty to adopt such means of redress and retaliation as they please. But where an extradition treaty does exist, and a criminal has been delivered up under it, he cannot, without violating the treaty, be tried for any other crime but that for which he was delivered up. ”
