"Detective Liu Xingchen has been a police officer for 15 years and has solved over 1000 cases, many of which were supervised by the Ministry of Public Security and the Provincial Public Security Department. He has been awarded the third class merit three times.

This book records the major cases he has personally experienced since becoming a police officer in 2007: from the underworld that rose to power through murder, to grave robbers who buried their bodies in their homes; From the wife who changed the face of her deceased husband in order to defraud him of insurance, to the husband who claimed to be the perfect lover even after killing two wives... These crimes, described in the news as ""extremely cruel in means, extremely heinous in nature, and having a great social impact,"" have uncovered a hidden corner in the calm daily reality of society.

Therefore, Liu Xingchen not only truthfully recorded these shocking criminal facts, but also popularized criminal law knowledge through specific cases, such as justifiable defense, immunity from punishment, etc., allowing ordinary readers to master a weapon to fight against illegal infringement.

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