Cheng Xiao smiled with satisfaction. Gu Xia had hit the nail right on the head.
He grew even more appreciative of Gu. "Let's hear it then. What's your thinking? Why do you believe that?"
Gu Xia tilted his head back, gazing at the ceiling. "During the autopsies of the three victims, it was discovered that they had all been injected with the powerful anesthetic drug WA2 before they died. I've read about this anesthetic and its effects are quite startling. It's said that a small bottle could knock out an elephant. Furthermore, it carries significant risks. In other words, using too much can damage the brain nerves, or even result in immediate death... And the autopsies showed that the victims died eight or even ten hours after being drugged. What does that tell us?"
Cheng Xiao listened intently without interrupting.
