Extradition To and From the United States: Overview of the Law and Recent Treaties [Updated September 30, 2003] [open pdf - 225KB]
"The laws of the country of refuge and the applicable extradition treaty govern extradition back to the United States of a fugitive located overseas. Requests travel through diplomatic channels and the only issue likely to arise after extradition to this country is whether the extraditee has been tried for crimes other than those for which he or she was extradited. The fact that extradition was ignored and a fugitive forcibly returned to the United States for trial constitutes no jurisdictional impediment to trial or punishment. Federal and foreign immigration laws sometimes serve as a less controversial alternative to extradition to and from the United States.
CRS Report for Congress, 98-958