Death Coordinates

Hard-core suspense reasoning, criminal investigation documentary style. As night fell in Jingnan City, a young man suddenly fainted on his way to get off work. His face was horribly distorted, and he later died from his injuries. No clues were left at the scene. Young detective Lin Musen made measurements and comparisons at the crime scene, calculated a quadratic function analytical formula, and used the quadratic function to lock the coordinates of the murderer...