Xiaotao looked surprised. But instead of explaining it to her in detail, I picked up the Autopsy Umbrella and told her to turn on the ultraviolet light.

Unfortunately, the entrance had been trodden on by the officers. The footprints overlapped, layer after layer so the bottom ones were no longer visible. 

"Let's make an assumption,” I began. “At the time, they were in the midst of the excitement when someone suddenly entered the room. The four suspects must have been frightened."

"Wouldn't they have killed the man?" asked Xiaotao.

“They aren’t as strong as you think,” I said, shaking my head. “They might even be weak, especially since they were half-naked and in a mess during the rape. They must have been scared half to death when they realized...