wait wat.... sorry i'm confused, so does he have evidence that sangwoo killed Chief Kwak?

Not yet, the killing scene of Kwak is what Seungbae imagined atm.. he surely wants to get the bottom of it. Let's hope the police force can be a bit smarter than before

thank you!!!!!!!!!

Sadly, they have no evidence right now. Listening to that recording, however, seems to be what Seungbae needed to get his shit together. I'm adding a link below to a previous post I made about the recording if you'd like to see my thoughts. Hopefully it helps!

http://www.mangago.zone/home/mangatopic/3707679/