He is the first former head of South Korea's Supreme Court to have faced questioning as a criminal suspect and be on the verge of being placed under presentencing detention. He has undergone three separate interrogations this month.

The scandal involving top justices and the top court has rattled the country, placing the judiciary under unprecedented scrutiny. Yang faces at least 40 counts, including abuse of power and leaking of state secrets.

The retired veteran justice is alleged to have instructed his officials at the National Court Administration, the top court's governing body, to devise ways to interfere in trials whose rulings potentially held high political significance for Park.

He is also accused of having orchestrated a delay in the deliberation of a damages suit filed by Korean victims of Japan's wartime forced labor to curry favor with the former president, who was seeking amicable relations with Tokyo.

He allegedly pressured judges in charge of such trials to deliver verdicts in Park's favor and disadvantaged the judges who were opposed to establishing another appeals court.

Yang has categorically denied the allegations. Appearing for the first prosecution questioning on Jan. 11, he defended the court system and officials, calling on the public to watch the probe "without bias or prejudice." (Yonhap)