After the two bodies were taken away, the officers who went out to investigate called and reported that they found the scene of the first crime. Xiaotao and I drove there immediately.

It was about two kilometers away from the dump site. There was a pool of blood on the ground with some fallen teeth lying around and several tire tracks, including an obvious brake mark. Although few people took this road, there was still the occasional car. After the incident, any vehicle passing by would have interfered with the crime scene, and the pool of blood was run over by tires.

Xiaotao assigned several officers to snap pictures of these tire tracks and take them back for screening. Additionally, she contacted the transportation department and immediately requested...