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

Summary

In this incident, a beef contamination case was uncovered in Hua'an, affecting over 100 people. Guan Feng, leading the criminal investigation, traced the source to Zhang Yong Qiang, who sold toxic cattle. After intense interrogation and threats to involve his family, Zhang began to confess. The investigation involved tracking meat batches, contacting affected restaurants, and preparing medical teams to handle potential widespread health risks from the contaminated beef.

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