Supreme Court Chief Justice Kim Meong-su apologized to the nation Thursday over allegations that the top court under his predecessor tried to use politically sensitive trials as bargaining chips in its dealing with the presidential office over organizational changes.

Kim also said he would consider taking criminal action against those involved in the wrongdoing and promised to carry out sweeping judicial reforms, such as completely separating the National Court Administration from the Supreme Court.

“As a judge serving in court and on behalf of the judicial branch, I offer a heartfelt apology to the people who must have felt shock and disappointment due to the terrible investigation results,” Kim said in a statement. “After collecting opinions from various circles, I will decide on criminal measures against those involved.”