A brother-in-law of former President Chun Doo-hwan was formally detained Monday to undergo further questioning over allegations that he evaded taxes in a land transaction to let Chun\'s children gain a profit. Lee Chang-seok was put under detention immediately after the Seoul Central District Court approved the prosecution\'s request for an arrest warrant. The 62-year-old is alleged to have played a crucial role in illegally transferring wealth from Chun to his two sons.