The Supreme Court now says that if you are sentenced to a certain amount of time, and if you are designated a "sexually dangerous offender" then you may be held without bail, or without punishment after your sentence is over if the court wants.
Setting aside the dangerous sexual offender aspect, how in the world do we justify keeping someone locked up? Seems to me the courts should just do what our state court does, and give them 100 years without parole.
Might be easier for you if you are a terrorist, and trying to kill Americans. At least then you would be presumed to be eligible to be released.