Forensic Detective (3 Volumes).

Summary

Chapter 7 summary: A chilling narrative involving a mysterious individual with a fish tank of piranhas who killed a black Labrador. Zhang Tong investigates the dog's death, discovering the murderer likely used a dog whistle to lure the animal. A young girl provides a key witness account of seeing a potential suspect with a bloody knife while fishing. Zhang Tong makes a critical breakthrough, realizing Wang Ya Nan's death was deliberately staged and might involve tampering with her medication. The investigation points to a complex, calculated killer with specific characteristics.

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