"These are photos from the scene. Take a look." Wang Xin took out two small paper bags and placed them before Wang Yan. "This one is from the first time we found dismembered limbs on the train—the body we eventually recovered. This one is the second body. The two crimes were two months apart. And this is Ding Guian's photo. See the character 'righteousness' tattooed on his arm? It's the same as the one on the second body's arm.
"And this man, like Ding Guian, has Type B blood. So, taking everything into account, we've tentatively identified this man as Ding Guian. Then there's this gesture—holding up only the pinky. I still haven't figured out what it means."
Wang Xin sighed. "Logically, this case shouldn't be ours. It belongs to Hacheng. The arm came from Hacheng, and the victim was from Hacheng too. But they refused to take it. Since we found it, it landed on our heads."
Wang Yan flipped through the photos and said with a smile, "What, you're unhappy to have a case? Besides, the information is this complete, so they clearly did their best. They must be investigating it themselves too."
"We're not short on cases. This one has neither a beginning nor an end, and it's a random murder. We still don't have any leads. What do you see?"
"This killer has developed an addiction to murder. He's killing deliberately for the thrill."
"How can you tell?"
"No matter what that gesture means, it appeared on two consecutive bodies, and the victims had no connection whatsoever. In other words, just as you said, the crimes were random. In that case, there's only one explanation. The case file says the victims' valuables were missing, which means he was after money.
"The first victim died from a