The rain knocked on the heavy metal door of the Municipal Bureau's Forensic Center, making a dull and continuous crackling sound. It is already late autumn, and the cold air creeps in through the cracks in the door. Su Renhua rubbed his fingers. His fingertips were cold, but the last throb from the last piece of evidence—a jacket stained with mud and dark blood—remained. It was a homeless man who died under a bridge. The cause of death was clear. The picture was chaotic and desperate, with the mixed smell of alcohol and urine.
