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

Summary

Guan Feng and his team investigate a murder case, carefully reviewing security footage from a bathroom. They discover a half-fingerprint on the faucet and begin cross-referencing with 43 potential suspects. During the investigation, they notice one person is missing from the personnel list. A key breakthrough comes when someone mentions an unexpected person on the 2nd floor bathroom. Guan Feng becomes suspicious and starts questioning the witnesses, believing the missing person might hold crucial information about the crime.

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