I had a hunch that the prosecutor was the one who killed Heeseon, his target is Yoonseok but since Heeseon and Yoonseok are living together he needed to erase Heeson, on the other hand Baek Tae (I guess his real name was Hale?, not sure if it is or just a codename) is working two jobs, one for government and one as a gangster for a cover or play only. Just guessing .
I had a hunch that the prosecutor was the one who killed Heeseon, his target is Yoonseok but since Heeseon and Yoonseok are living together he needed to erase Heeson,
on the other hand Baek Tae (I guess his real name was Hale?, not sure if it is or just a codename) is working two jobs, one for government and one as a gangster for a cover or play only. Just guessing .