So Double Jeopardy does apply.
Double Jeopardy can only be used as an ARGUMENT to not extradite her. It is a US law that applies on US soil, she was not on US soil when she allegedly committed the crime, was charged, convicted, acquitted and convicted again so there is a very good argument that she should be extradited.
Add that to the fact that we want Snowden, and it will look ridiculous for us to complain about Russia not extraditing him when we won't extradite a girl who has already been convicted of murder TWICE, and you get a very high likelihood of extradition.
Read this:
"By ALAN DERSHOWITZ
March 27, 2013 8:19 p.m. ET
Italy's highest court may have begun a diplomatic and legal tug of war with the United States on Tuesday when it reversed the 2011 acquittal of Amanda Knox. Ms. Knox, you will recall, is the American former exchange student convicted by an Italian trial court in 2009 of murdering her British roommate, Meredith Kercher—but that conviction was overturned on appeal two years ago, and Ms. Knox returned from an Italian prison to the U.S.
The factors behind the initial conviction included an admission by Ms. Knox that she was at the crime scene in the northern Italian town of Perugia, plus her false accusation that a bartender had slit Kercher's throat. The case against her also included a questionable alibi and evidence of her DNA on the alleged murder weapon. In a bizarre ruling, the trial court held that Ms. Knox's admission could not be used against her, but that her false accusation could form the basis of a separate crime that the Italians call "calumny." The appeals court then threw out the DNA evidence (for technical forensic reasons) and acquitted Ms. Knox of the murder charges.
Now Italy's highest court has 90 days to explain its decision to reverse that acquittal. Whatever its reasoning, Italian law calls for the case to be reheard by a new appeals court, which can either affirm the conviction or order an acquittal. If the conviction is ultimately affirmed, the Italian government can petition the U.S. to extradite Ms. Knox to Italy to complete serving the 26-year prison term to which she was sentenced in 2009.
Ms. Knox would likely challenge any extradition request on the ground that she was already acquitted by the lower appellate court, so any subsequent conviction would constitute double jeopardy.
That is when the real legal complexities would kick in, because Italian and American law are quite different and both will be applicable in this transnational case involving a citizen of one country charged with killing a citizen of another country in yet a third country.
America's extradition treaty with Italy prohibits the U.S. from extraditing someone who has been "acquitted," which under American law generally means acquitted by a jury at trial. But Ms. Knox was acquitted by an appeals court after having been found guilty at trial. So would her circumstance constitute double jeopardy under American law?
That is uncertain because appellate courts in the U.S. don't retry cases and render acquittals (they judge whether lower courts made mistakes of law, not fact). Ms. Knox's own Italian lawyer has acknowledged that her appellate "acquittal" wouldn't constitute double jeopardy under Italian law since it wasn't a final judgment—it was subject to further appeal, which has now resulted in a reversal of the acquittal. This argument will probably carry considerable weight with U.S. authorities, likely yielding the conclusion that her extradition wouldn't violate the treaty. Still, a sympathetic U.S. State Department or judge might find that her appellate acquittal was final enough to preclude extradition on double-jeopardy grounds.
Italian courts could probably have avoided this complexity by requiring Ms. Knox to remain in Italy, perhaps subject to house arrest, until the completion of the appeals process. Instead, Italian authorities allowed her to return to the U.S.
It is now unlikely, according to her Italian lawyer, that she will return to Italy while legal proceedings play out over several years in appellate courts where her presence isn't required. Meanwhile, she will be selling a memoir in the U.S., where she is widely regarded as a wrongfully convicted victim of an unjust Italian legal system. In Italy and England, she is seen by many as a guilty and manipulative American.
The family of the victim may file suit against Ms. Knox, especially in light of the large advance she reportedly received for her book. There is no double-jeopardy bar to such a civil suit, which could be brought in the U.S. (where the money is), in Italy (where the crime was committed) or in England (where the victim's family lives and where the book will also be sold). All that is required for a civil suit to succeed is proof by a preponderance of the evidence, and American or British courts may well admit evidence in a civil case that the Italian courts excluded in the criminal one.
Over the next several years, then, we will likely see a major demonstration of transnational law—that is, law applied by the domestic legal system of one nation against citizens of other nations. Each of the three countries involved in this case will seek to do justice by applying its own distinct rules to litigants and victims from different countries.
Transnational law is distinct from international law, which is uniform and often applied by international bodies, such as the International Court of Justice and the International Criminal Court. International law isn't generally applicable to domestic crimes committed by individual citizens of one nation against those of another.
As national borders become more porous, citizens more mobile, businesses more multinational and international courts more politicized, the trend toward the transnational application of laws will become more pronounced. This will increasingly expose U.S. citizens and businesses to the vagaries of foreign laws and procedures with which they may not be familiar, but that is a price to pay for the benefits of a shrinking world.
By becoming an exchange student in Italy, Ms. Knox subjected herself to Italian law. By coming back to America, she received the protection of the American extradition process. As for how all this will turn out, she is in uncharted territory.
Mr. Dershowitz is a law professor at Harvard. His latest book is "Trials of Zion" (Grand Central Publishing, 2010)."