South Korea's former president, Roh Moo-hyun is to face questioning by the country's top prosecutor over alleged bribe-taking.
Roh, who led South Korea from 2003-2008, is suspected of taking millions of dollars from a businessman at the centre of a corruption scandal.
He has already admitted that his wife received $1m but denied the money was a bribe.
Speaking before leaving his home town to travel to Seoul on Thursday, Roh told reporters "I have no face to show to the people. I am sorry for disappointing you."
No formal charges have yet been levelled against Roh, who left office in February last year.
Supporters gave Roh a warm send-off, waving yellow balloons and roses, with some scattering flowers on the road ahead of his bus as it departed.
Almost every South Korean president, who was not forced out of office or assassinated, has faced corruption allegations after stepping down.