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

Summary

In a room under investigation, Guan Feng meticulously examines a pink thermos cup, noticing a fresh bump mark. He instructs his team, including Old Wang, to check for signs of struggle, as the room appears too tidy. Old Wang discovers traces indicating a recent collision, correlating with the owner's departure. The team conducts a thorough examination, gathering fingerprints and footprints from an elderly couple. Meanwhile, the Communications Department tracks a phone signal to Tongshui River. A salvage team retrieves a black mobile phone, likely belonging to the missing person, prompting Guan Feng to confirm its ownership.

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