The convicted chief of the country's third-largest conglomerate SK Group will step down from his position as chairman, officials at the business group said Wednesday, removing him from all management affairs. Chey Tae-won, 53, was sentenced to a four-year prison term last week after being convicted of embezzling 46.5 billion won (US$43.6 million) from two SK Group affiliates, including top mobile carrier SK Telecom Co., and funneling the funds into personal investments in stock futures and options in 2008