C163 Investigate(2)

Ouyang Du shouted, prompting Jiang Yiheng and Pang Xiaoxuan to swiftly shine their flashlights at the brightest setting. They discovered a tiny red dot that was clearly a dried bloodstain, likely left by something that had been inserted and then removed, taking a trace of blood with it.

Previously, Su Fei had concealed his skill with needle-type hidden weapons due to his superior strength