Judges could officially clear Amanda Knox of the 2007 murder of former Leeds University student Meredith Kercher today.
Italy's Supreme Court will rule whether there are grounds for a retrial against Knox and her ex-boyfriend Raffaele Sollecito.
The pair were cleared of 21-year-old Merdeith's murder on appeal, 17 months ago, due to a bungled police investigation.
They were initially jailed after Meredith was found with her throat cut in the house she shared with 25-year-old Knox in Perugia.
A panel of judges will meet in Rome to rule whether legal codes were applied fairly.
They could order a new trial or close the case completely.
Drifter Rudy Guede is already serving 16 years for Meredith's murder