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

Summary

The investigation focuses on a mysterious intrusion at Shang Na Na's villa, centered around an unusual window latch with rust marks. Captain Guan Feng discovers the window was rarely opened due to the young lady's rhinitis. A potential lead involves unexpected fireworks near the villa on the night of the incident. The police team is conducting a comprehensive investigation, searching a three-kilometer radius for fireworks evidence and thoroughly vetting all villa staff to identify potential inside help while maintaining strict confidentiality about the ongoing case.

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