Prosecutors resummoned the former head of the financially troubled shipping and shipbuilding conglomerate STX Group on Sunday for questioning over his alleged embezzlement and business malpractice. Kang Duk-soo, who headed the group between 2003 and February 2014, is accused of funneling the funds of STX Heavy Industries Co., a troubled shipbuilder unit, to illegally support other ailing affiliates and misappropriating company money to bribe politicians