Amanda Knox's sister: 'Nightmare is over'

Amanda Knox, and her former Italian boyfriend, Raffaele Sollecito, have had their convictions for the murder of the British student, Meredith Kercher, overturned.

Both defendants have been freed on appeal by a court in Italy after serving under two years of their sentences.

They had always denied killing Meredith Kercher in the town of Perugia in 2007.