Prosecutors on Monday called in a brother-in-law of former President Chun Doo-hwan for questioning as part of their efforts to find concealed assets of the former military dictator convicted of taking bribes while in office in the 1980s. Chun was ordered by the nation\'s top court in 1997 to return to state coffers some 220 billion won (US$196.8 million) he illegally accumulated through bribery from big businesses during his military rule from 1980 to 1988. Chun, who seized power through a coup, has yet to return some 167.2 billion won to the state.