Former Supreme Court Chief Justice, Yang Sung-tae , walked out of the prosecutor's office late last night, after over fourteen hours of questioning on more than 40 charges.
He left without making any comments to the reporters there.
Yang is accused of using the court to lobby for the former Park Geun-hye administration, and faces at least 40 charges including abuse of power and leaking state secrets.
He allegedly pressured judges to make rulings in Park's favor and postponed deliberations for a lawsuit filed by Korean victims of Japan's wartime forced labor to aid President Park, who was then seeking friendly relations with Tokyo.
Yang is the first former head of Seoul's Supreme Court to be grilled as a criminal suspect.
Yang may be summoned once more, as early as Sunday.