It has been a case that has captivated the world for nearly eight years, but March 25 could signify the official end when it comes to Meredith Kercher's 2007 murder in Perugia, Italy.

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Kercher's former roommate, American Amanda Knox, and Knox's ex-boyfriend, Raffale Sollecito, were convicted of Kercher's murder for a second time in January 2014, and now, their case will head to Italy's Supreme Court of Cassation, which will determine their fates once and for all.

According to The Daily Beast, the court will examine the new convictions and decide if they should hold up, or if they will be thrown out, allowing Knox and Sollecito to go for their third and final appeal.

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If a new appellate trial is ordered, the case will still be on-going for potentially several more years, and it is unclear how it would potentially turn out.

"The high court wasn't happy with the acquittal, but we won't know if they will be satisfied with the way the new conviction was won until they rule," Francesco Maresca, a lawyer for Knox's family said "But in a murder case, if it goes bac [to appeal] for a third time, it generally points to enough reasonable doubt to acquit them in the eyes of the court."

However, if the court does confirm the convictions, it will be the last word on the case, and Sollecito, who is still in Italy, will likely begin serving his 25-year prison sentence immediately. The same is not something that can be said for Knox however, as she remains in the U.S., and could become engaged in a large extradition battle.

And though many in the U.S. have believed that this country's concept of Double Jeopardy would prevent Knox from being extradited, it may not be the case after all, as the U.S. does have a valid extradition treaty with Italy, meaning they could force Knox to head back to Italy.

"Double jeopardy may be a popular concept to talk about in the United States, but it won't make a difference in a legal argument when it comes to extradition," lawyer Nicola Canestrini said. "The United States, in signing an extradition treaty, agrees that Italy's three-tier judicial system is not double-jeopardy."

It is currently unclear what path the U.S. would take if Knox's conviction was upheld.

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