The whole point of trials is to establish that the person performed the crimes that they are alleged to have performed. You can't assume they're guilty and then declare that not holding a trial is OK.
Bob is actively trying to kill Americans and is avoiding trial by hiding in a foreign country. Joe is a peaceful guy who's falsely accused of trying to kill Americans, and lives in a foreign country for unrelated reasons. By what system do you propose we distinguish between Bob and Joe?
Bob is actively trying to kill Americans and is avoiding trial by hiding in a foreign country. Joe is a peaceful guy who's falsely accused of trying to kill Americans, and lives in a foreign country for unrelated reasons. By what system do you propose we distinguish between Bob and Joe?