crime without proof

Serial killings, borrowed body layout, this series of undocumented crimes, he said killing is to save people, do you believe it? Behind the cold-blooded crimes is a heart that has been gnawed by love and hate for ten years. Once the most truthful and good, now the most tolerant and ruthless, see a man in hell, how to redeem the fire in the industry!

In a busy city, murders occur frequently. At the scene of a murder, the culprit always intentionally leaves a fingerprint and a note - "Please come and catch me", other than that, there is not the slightest crack.
In the face of such a high-profile serial killer, the task force has been established four times and disbanded four times, without a clue, and can only turn to the mathematical logic expert Yan Liang, this unsolved case, the suspicion is as difficult as an unsolvable equation, how can he start to decrypt it?
Why does the real culprit, who has carefully arranged this undocumented crime, always leave clues on purpose? Is this a huge conspiracy or a trap, or is there a deeper hidden secret?
"Undocumented Crimes", dazzling maze, endless killing opportunities, a criminal master, a detective superhuman, chess rivals, who won the high-intelligence gambling game? After the cocoon, the truth is chilling but mixed feelings.