In October 2006, two young British children, Christianne and Robert Shepherd aged seven and six years old respectively, died from carbon monoxide poisoning caused by a faulty boiler while on a holiday in Corfu booked through Thomas Cook. They were the first such deaths in the company's history. Two Thomas Cook employees were subsequently amongst 11 defendants facing manslaughter by negligence charges at a criminal trial in Greece in 2010; both were acquitted and the company was cleared of any wrongdoing.