Psychological Mysterious Case.

Summary

The Criminal Police Squad captures He Zheng Lei, who claims to be the Yama seeking revenge for his sister's murder. During interrogation, he reveals his motivation and psychological manipulation techniques. However, Su Yun suspects He Zheng Lei isn't the true Yama. Through investigation and a photo album, Su Yun discovers Xie Yi Jun, a psychology expert and teacher, might be the real mastermind behind the murders. Su Yun ultimately concludes that Xie Yi Jun, sitting in a wheelchair and holding a black notebook, is the actual Yama.

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