The former head of the financially troubled shipping and shipbuilding conglomerate STX Group was formally detained Tuesday pending trial over alleged embezzlement and business malpractice. Kang Duk-soo, who headed the group from 2003 to February 2014, is accused of funneling the funds of STX Heavy Industries Co., a troubled shipbuilder unit, to illegally support other ailing affiliates, including STX Construction Co. and STX Dalian Co., and misappropriating company money to bribe politicians.