Chen Shi called Peng Sijue and wanted him to send a few forensic police officers over to identify the traces, but he couldn’t get through. Lin Dongxue said, "Captain Peng is still dissecting Little Wei's body now, right? Why don't we come back tomorrow?"

"Someone climbed out of this window that night. The main point is not the traces on the window frame, but the suspicious fiber on the pipe. Can we take it off ourselves?"

"That isn’t a good idea. I just saw it. That piece of fiber is on the fifth floor. It's too dangerous to climb out of the bathroom window in order to pick it up.

"Then we should go to the fifth floor!"

Lin Dongxue smiled bitterly. "All right!"

The two knocked on the door of the tenant on the fifth floor, took the small piece of...