American Amanda Knox says she will not travel to Italy for an appeals trial over the 2007 murder of British student Meredith Kercher.
"I was already imprisoned as innocent person in Italy," Ms Knox said told NBC. "I just can't relive that."
Ms Knox and her Italian ex-boyfriend Raffaele Sollecito were found guilty in 2009, but acquitted on appeal in 2011.
In March, Italy's highest court overturned both acquittals, ordering a fresh appeals process.
Ms Knox spent four years in prison before her acquittal.