I find it interesting they are leaving the parents alone. What did they know and what did they tell that we still don’t know.
I would suspect they have spent quite a bit of time with them, looking for answers, background etc...
I heard the parents are currently hospitalized.
They live in South Korea. Apparently the mother colapsed in grief and shame, and has been hospitalised.
You asked — “What did they know and what did they tell that we still dont know.”
According to the dorm-mates, Cho stayed there during holidays and didn’t go home and no one ever visited him there, not even his parents.
Regards,
Star Traveler