From the Associated Press:
American Amanda Knox was acquitted of murder and sexual assault by an Italian appeal court on Monday after four years in custody over the killing of her British housemate Meredith Kercher.
The dramatic ruling overturns a 26-year sentence handed down to Knox in the original trial in which she had been found guilty of murdering Kercher together with her then boyfriend Raffaele Sollecito and local drifter Rudy Guede.
Original update here.