With Amanda Knox’s fate hanging in the balance, an Italian court is weighing the merits of an independent forensic review of evidence that led to her murder conviction. As part of an appeal to overturn her 26-year sentence, Knox's lawyer is asking the court to re-examine the DNA found on the kitchen knife that was used to murder Meredith Kercher. Prosecutors are pushing for Knox to get a life sentence if the court still deems her guilty, but Knox maintains that she is completely innocent. Her lawyer is also asking the court to enter a new witness: Luciano Aviello, a member of the mafia who claims that Kercher was killed by his brother. Aviello says that his brother and an Albanian man killed the Leeds University student as part of an attempted burglary.