Customs officials said a shipment of 18 human heads destined for cremation was seized at O'Hare International Airport in Chicago because of a paperwork snafu. The shipment arrived in late December but the paperwork was incomplete and it was unclear where it was supposed to go. The heads had been embalmed and had been used for medical research, a spokesman for the Cook County medical examiner's office said. They had been shipped from Rome aboard Lufthansa. It wasn't clear why the heads were transported halfway around the world to be cremated. The medical examiner's office had been holding the heads for safekeeping since the week before Christmas. Read more