The actor that played a university professor in "March", appeared in what courtroom thriller film directed by Sohn Young-sung?
Sung Dong-il:  He rose to fame as the comic, Jeolla dialect-speaking character "Red Socks" in the television drama "Eun-shil", though he later tried to fight typecasting by playing the son of a chaebol tycoon in "Love In 3 Colors" and a university professor in "March".
i don't know