Prosecutors called in former President Lee Myung-bak's son Lee Si-hyung on Sunday to question him in connection with slush fund allegations and suspicious trade involving an auto parts company he owns.
Prosecutors suspect his father, the former president,... abused his presidential power to help the company -- called DAS -- recoup investments and create slush funds under dozens of fake names, evade taxes and embezzle money.
Investigators are also looking at who actually owns DAS,... with more and more people suspecting the owner is Lee Myung-bak, the former president himself, not his son or his brother.
Watchers say, with the investigation zeroing-in on the former president's family members,... Lee Myung-bak could soon be called in for questioning himself.