Spin Off is something not related to the main story right...As for as people who has taught me said that...Should…
no you don't need to watch stranger to understand his character. In this spinoff is where he gets character development which shapes him into a different person. his character is potrayed as morally grey in sequels he's the kind of guy who tries to keep up with social hierarchy and capitalism of those above him.
I think not. That would be a joke MC if he interviewed a criminal and couldnt figure out
Jang te su profiled the behaviour of the killer and assumed that the killer is highly likely timid and someone with investigative knowledge so either it's Noh jae won ( he seemed empathetic in nature while back in meeting room) or someone inside police department. as you can see the English translated title for this drama is "such a close traitor".
poor guy got dumped throughout