I, King of Criminal Investigation, Solving the Rainy Night Serial Murders from the Beginning.

Summary

A man is nervously questioned about a murder that occurred in a restroom. Guan Feng, the interrogator, suggests that being an accomplice can also lead to guilt. The man eventually identifies Old Yang, who is brought in for questioning. Despite initial explanations, the investigation yields no matches for the fingerprints collected from the suspects. Guan Feng considers the possibility that the fingerprints might belong to someone else, like a repairman, complicating the investigation. As the team takes a break for lunch, Guan Feng reviews inquiry records and focuses on a participant named Chen Guang, indicating further investigation is needed.

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