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

Summary

Zhang Qing Shu recalls his past encounters with Zhang Yong Qiang, revealing that he was intoxicated during a night of drinking when he received poison. Guan Feng questions Zhang about the incident and suggests an arrest based on newfound evidence. Zhang Chang He is persuaded to comply with police orders. Meanwhile, Guan Feng learns of fresh footprints at the cattle shed, indicating the suspect's presence after a recent rainstorm. Zheng Yuan Dong confirms that these footprints could lead to the perpetrator, as they align with the poisoning of Zhang Hua Feng's cattle. The investigation intensifies as they prepare to follow up on these crucial clues.

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