Drama with so many plot holes and the sloppy police investigation.

In my opinion, the drama ends without drawing special attention to the abused orphans or (lack of empathy) on the unfair deaths of the orphans. The crazy dog Baek Moon Kang killed at least 20 orphans (sent to university as cadavers donation). There are also crime of sexual favour and the sexual exploitation of the female orphans. Lack of justice. The judicial system is supposed to be totally fair.

~ From the beginning, I dislike the character of the detective Ryu Sung Joon. Too often, he use unnecessarily violent. He becomes extremely and uncontrollably angry, often to the point of violence when capturing suspects.

The ending of the drama makes me pity Sung Hoon. I feel sympathetic sorrow for Sung Hoon's substantial misfortune. Sung Hoon said that he wants revenge, not murder but Jung Yoon Jae enjoyed the killings.

Their revenge plan starts after Jung Yoon Jung died. The real killer is Jung Yoon Jae (juror Jung In Seong), he is such a psycho killer. Jung Yoon Jae displays psychopathic behavior since childhood. His serial killer behavior as an adult is based on choice, despite childhood experience.

Question :
Do the abused, traumatised orphans need to become 'monsters' in order to uncover the truth?

What with the sloppy police work, rush to judgment and failure to investigate?