In my attempts to try to understand extradition laws, I came across this:
"As described above, even a suspect who flees to a country without a formal extradition treaty with the US is not necessarily safe from extradition because of the possibilities of comity or waiver of specialty doctrine requirements. Further, the United States government can still have such the suspect illegally kidnapped, and as long he or she wasn't tortured en route (as in the Toscanino case, although not all US Circuits follow the Toscanino decision), the Ker-Frisbie doctrine is still satisfied thus leaving the suspect without any real legal recourse. I hate to say it, but in short, it's currently legal for the United States to illegally kidnap people all over the world. It may sound shocking, but it is fact, and not merely my opinion. The Ker-Frisbie line of Supreme Court decisions speak for themselves, and I encourage you to read them!"
http://www.freeexistence.org/us_extradition.html