A sexual motive was ruled out in Amanda Knox's murder trial, but it hasn't stopped calls for her to register as a sex offender in the U.S.

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In a July 23 posting on allvoices.com, the article's writer mused over why Know had not registered as a sex offender in Seattle, Washington, after she was convicted of Kercher's murder in Italy.

Citing Washington state legislation, the author, Chelsea Hoffman, writes that people who are convicted of sexual offenses are required to register as sex offenders in the state-something Knox has not been required to do, despite, as Hoffman puts it, being convicted of a sexual offense.

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"Meredith Kercher was sexually assaulted when she was murdered by Knox, Raffaele Sollecito and Rudy Guede, making the murder of Meredith Kercher a sexual offense," she wrote.

However, Hoffman's calls for Knox to register as a sexual offender may be unfounded, as the only person whose conviction of a sexually-based crime against Kercher has held was Guede, who is serving a 16-year sentence for rape and murder. Both Knox and Sollecito were acquitted of the charges in 2011, which was when she returned to the U.S.

While Knox was convicted of the charges again earlier this year, she is preparing a second and final appeal case to be heard by early 2015. Though the Washington law does have subsections that state someone convicted of a crime in another country, or who is not confined in prison after they are convicted are still required to register, there is nothing explicitly stated that enforces her registry while on appeal.

If her conviction is upheld and she is extradited to Italy, she will no longer be required to register in Washington unless she were to return after serving her 28-year-sentence.

It is unclear if Knox has changed her strategy for her appeal, but the Nencini Report, which was cited as the cause for her reconviction, did dismiss all possibilities of a sexual motive.

The Report, which was released to the public in May, rejected the earlier claims that Kercher's murder was the result of a drug-fuelled sex game that went wrong, and said that judges believed Knox killed her roommate due to other motives.

"That night there was a fight, the motive was not sex," the judges said in their ruling. "It is not believable that group sexual intercourse between the four of them had begun. This is not consistent with the personality of the English girl."

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