Capture the Demon: River of Despair!

A top student became the real culprit in a massacre, causing the city to boil! He hid so deeply that Gu Jianghua, who graduated from the police academy, was astonished. He encountered this murderous case on his first day at work and vowed not to be a human being until the case was solved. However, he obviously underestimated the criminal's IQ. Every year he receives a New Year's card from the criminal. This was not only an insult to him, but also a provocation to the police force. Although they were furious and used all their resources to pursue it, it was like finding a needle in a haystack. There were a total of seventeen suspects who came into Gu Jianghua's eyes. He spent twenty years tracking and investigating each one, and found that there was a tragedy even more shocking than this. A group of extreme personalities triggered by a murder shows this cruel world before our eyes. Do you want to cry, but don't know for whom you should shed your tears? You want to scold, but the streets with endless traffic don't know who to target? He is an outcast in this world. He embraces this world with enthusiasm, but it gives him a cold back. She is the darling of this world. She was pushed to the top of the tower and then thrown into hell until she was swallowed by darkness. No one can escape justice, only tenacity can bring the real murderer to justice! Gu Jianghua, come on!