At the case discussion meeting at 9:00 in the morning, Song Lang told everyone the results of the autopsy and his own inferences. “The direct cause of death was the sharp weapon piercing the aorta, causing a pseudoaneurysm. There was no other injury on the deceased except for the fatal injury. From the weapon's angle of penetration, the deceased was in a squatting position, and the murderer had attacked him in front from above. The alley where the crime occurred was narrow and long, and there was no place for an ambush in the deceased’s direct line of sight. If a stranger were to walk over, the deceased, who was carrying valuables, would definitely be on guard. From this, I speculate that the murderer should be an acquaintance... Perhaps this was the situation at the time: The murderer walked over directly and talked face-to-face with the deceased. During...