I have a question.
Just before the guy was revealed, there were the conversation the leader Hwang and chief. Is this really happening? Or it was a flashback?
the conversation spoke about how they found one of the item at the scene - a pair of handcuff.
And it prompted one of them to say is a policeman because he has the keys to unlock. Then the scene showed the back of the guy who eventually took off his jacket to reveal he is indeed a policeman in disguise.
if they already know about this why didn’t they suspect anyone among the police?