Xiaotao and I stared at the old man, never imagining that the tetanus shot and gecko had such meaning. Even I hadn't seen these two pieces of key evidence in any versions of the file. How could the murderer know?

"Officer Nie, who else have you told these things?"

Interrupted mid-conversation, the old man looked very impatient. "I’ve never told anyone,” he frowned. “Although I’m not wearing a police uniform now, I’m still a policeman in my heart. I would never tell these secrets to an outsider."

"But since we entered the room, you haven't asked us for our identification!" Song Xingchen hit the nail on the head.

The old man paused, suddenly bursting into a temper and chasing...