Criminal Investigation Cold Case

Criminal investigation reasoning + unit case + unresolved case reversal Liu Yan of the Linjiang City Criminal Investigation Detachment has secured the position of captain at the age of 28. His colleagues call him "Team Liu" not only because of the 17 major cases he has solved during his five years as a police officer, but also because he can always dig out the deepest clues from seemingly unsolvable deadlocks. The story begins with an unknown female corpse in Jiangtan Park - it has been sealed in concrete for three years. Half of a special chain is stuck in the skeletal neck. The only token is a butterfly earring with a missing corner. The report of forensic doctor Zhu Mingyu shattered the speculation of "ordinary homicide": the chain contained rare alloys, and trace amounts of toxins were hidden under the enamel layer of the earrings. This is not the end, but the starting point. The whole book is organized into unsolved cases: from the burning of corpses in a secret room in an attic in an old city, to the series of falls in Internet celebrity B&Bs; from the courier who disappeared in the rainstorm, to the same modus operandi as the Bones case twenty years ago. Each case is independent, but connected in details - the butterfly element appears repeatedly, and the craftsmanship of the special chain points to the same secret source. Liu Yan led police officer Li Ming back and forth between the scene and the files. Director Zhang Zhiqiang controlled the direction from behind, and Zhu Mingyu's autopsy report was the sharp blade that tore through the fog. As the truth of each unit case emerges, the giant net surrounding Linjiang City is slowly tightening. There are no quick answers here, only step-by-step tracking. Each unsolved case is a piece of a jigsaw puzzle, which may be the city's most reluctant secret.