At 7:00 in the evening, guests went into Huoxing Bar one after another. The boss suddenly found a man crouching behind the bar checking the whiskey bottles and asked the bartender, "Who is this?"

"Police. He said he was looking for clues. He’s been squatting down and looking at the bottles for over an hour now.”

"Oh!" The boss looked at the guy suspiciously.

Chen Shi was checking all of the fingerprints on the Johnnie Walker Red Label whiskey bottles. He had asked Peng Sijue for Zhang Jinlei's fingerprint samples. When the homicide case happened six years ago, the fingerprints of all parties had been collected by the police.

Chen Shi stuck tape on all the bottles to lift off the fingerprints. He compared them with the samples and finally found a match.

He stood up and asked the bartender, "On the evening of the 7th, there was a guest...