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"No matter how clever the crime is, it can't escape their noses and eyes!" The police dog detective with incredible intelligence, good at solving crimes, and even more funny things is coming with a "surprise"! Lin Xuan is a top student in animal behavior research. After falling ill at a young age, he discovered that he had the ability to "communicate" with dogs. Four years ago, Lin Xuan's sister Lin tide disappeared in the "7.23 Serial Murders". Lin Xuan wanted to use the resources of the police force to find her sister, so he joined the police dog brigade. This book tells the story of the protagonist Lin Xuan leading bloodhound Rose and Husky Succulent to solve crimes through reasoning. Both police dogs have unique guarding skills, but their personalities are different, ranging from funny to serious. This book describes a total of three side stories and one main story, which are the confusing case of a missing boy, the corpse dumping case in an abandoned factory, and the Jingcheng arson case. The reasoning is rigorous and the logic is reasonable. They all serve the main line "7.23 Serial murders" and echo back and forth. The plot is very complete and fascinating.

In a campus murder case with solid evidence, criminal investigation team leader Lin Qing discovered that the murderer died earlier than the victim. A girl who disappeared on the same day appeared in the city nine months later, revealing a truth that had been hidden for four years.