The former head of the financially troubled shipping and shipbuilding conglomerate STX Group has been indicted on charges of embezzlement and business malpractice, prosecutors said Thursday. Kang Duk-soo, who headed the group from 2003 to February 2014, is accused of diverting the funds of STX Heavy Industries Co., a troubled shipbuilder unit, to illegally support other ailing affiliates, mostly STX Construction Co., prosecutors said.