South Korean prosecutors have summoned former President Lee Myung-bak for questioning as a criminal suspect in a bribery scandal. The corruption allegations also involve the 76-year-old's relatives and aides during his 2008 to 2013 presidential term. Seoul prosecutors have been investigating multiple cases of bribery amounting to millions of dollars. His successor Park Geun-Hye was ousted last year. The verdict in her trial on charges of bribery and abuse of power is due next month, with prosecutors demanding 30 years in jail.