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

Summary

Guo Xiao Dong explained that three days ago, he received a call from Wang Jian, who claimed to have accidentally killed Wang Juan and sought Guo's help. Under pressure, Guo complied, revealing that he had a past relationship with Wang Juan. Wang Jian, infuriated upon discovering this, coerced Guo into handing over keys to his apartment, which Wang Jian used to access Wang Juan's residence. In a violent confrontation, Wang Jian killed her and later fabricated a story. Guo Xiao Dong confessed to his involvement and revealed that he hid the murder weapon, a fire extinguisher hammer, in his dormitory's toilet tank. As investigations proceeded, Wang Jian panicked upon learning of Guo's confession.

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