( CNN ) -- Amanda Knox says she 's scared to return to Italy to face a new trial nearly six years after her study-abroad roommate 's slaying . But she 's considering it . `` I 'm afraid to go back there , '' she told CNN 's Chris Cuomo . `` In Italy , '' she added , `` people think it 's arrogant of me to sit here in the United States and have a book come out and defend myself . And first of all , I find that incredibly unfair , because I have the right to defend myself . And no one can ask me to just shut up because it 's convenient . But at the same time , I want to prove to them that I care about what 's going on . '' Knox and her ex-boyfriend Raffaele Sollecito are accused in the 2007 killing of 21-year-old Meredith Kercher in Perugia , Italy . In a wide-ranging interview set to air on CNN Tuesday night , Knox spoke to Cuomo about the case against her . `` I find it incredible that despite an absolute lack of evidence that connects me to this murder , I am still being judged based upon unrealistic and unreasonable expectations about how a young woman would react to a horrible situation , '' she said . `` No one knows how they would react to a horrible situation until it happens to them . '' Criticisms that she was cold and unfeeling about her roommate 's murder are unfair , she said . `` I have cried . I have been angry . I have been scared . And these were all things ... that I have shown , that have come out of me , '' she said . Knox : I wanted to come back from Italy stronger and surer . For years , the twists and turns of the case have drawn international attention . The case began in 2007 , when Knox , then 20 , was studying abroad and lived with Kercher . That November , Kercher 's semi-naked body was found at the home where they lived , her throat slashed . Police arrested Knox and Sollecito , who was her boyfriend at the time . Two years later they were convicted of murder . Another man , Ivorian drifter Rudy Guede , was convicted separately of Kercher 's killing . Guede admitted having sexual relations with Kercher but denied killing her . Case is complicated , confusing mess . A jury overturned Knox 's conviction in 2011 , and she flew home to Seattle . An Italian appeals court overturned Knox 's acquittal earlier this year , but experts disagree over whether the U.S. State Department will extradite her to be retried . She told CNN she was shocked to learn that there would be a retrial . `` There 's no evidence against me , '' she said . `` There is nothing that links me to this murder . I am not present at the crime scene . I am just not . '' She said theories from Italian police and prosecutors that she was involved in a sex game gone horribly wrong are `` absurd . '' Opinion : What Knox can and ca n't tell us . `` I was not strapping on leather and bearing a whip . I have never done that . ... I have never taken part in an orgy . Ever , '' she said . Prosecutors had no evidence to substantiate their claims , Knox said . `` No one has ever claimed that I was ever taking part in deviant sexual activity . None of my roommates , none of my friends , none of the people who knew me there , '' she said . `` This is simply coming out of the prosecution . '' Knox , now 25 , spoke to CNN on the heels of the publication of her memoir , `` Waiting to be Heard . '' She reportedly was paid a $ 3.8 million advance for the book . Asked by Cuomo during the interview why it looked like she had injuries on her hands , Knox said she was going through self-defense training . `` I 've received death threats since I 've been home , '' she said . `` And I do n't ever want to be caught in a situation that Meredith was caught in where someone is able to overpower me because I just do n't know what to do . '' `` There are not normal people who are fixated on me , '' she added . `` And I do n't know what they 're capable of . I do n't . '' Timeline : Kercher murder case . CNN 's Eliott C. McLaughlin , Hada Messia , Ben Wedeman and Laura Smith-Spark contributed to this report .
Amanda Knox says she 's considering returning to Italy for a retrial . Knox says she has been judged `` based upon unrealistic and unreasonable expectations '' In a wide-ranging interview , she reveals she is studying self-defense after death threats . An Italian court has overturned her acquittal ; Knox maintains her innocence .