Very captivating. I hope to see more docu-series like this. I know Korea is excellent in portraying real life stories through films (such as memories of murder directed by Bong joon ho), but a documentary definitely hits different. Both films and documentaries like these are disturbing to watch but are fundamentally impactful in terms of refining the whole police system etc. I respect Korean directors who are not afraid to expose the darkest problems so change can happen..
P.S
I still think some darker secrets are involved concerning how many serial killers are still alive to this day in detention centres despite being sentenced to death, including Yoo whose face was covered for whatever insane reason. It's disturbing to think of when families of victims have taken their own lives...
All in all, I hope every parent is responsible enough to look after their child because problematic childhood can potentially ruin them..and many others...