C25 Find the Killer

Cai Guo, who was in his room, kept his head down in silence. He kept staring at his hands. The emotions in his eyes rose and fell along with the trembling of his hands.

After a long time, Cai Guo calmed down and got up to pour some water. Although it was almost inaudible, the kettle still kept shaking in his hands.

"Bang!" The door was suddenly opened and the light shone in. At the same time