Within the forensic building of the Beijing Bureau, there's its own Physical and Chemical Laboratory, considered a rather luxurious setup, because even Ningtai County Bureau's building number 9 doesn't have one.
Jiang Yuan found a clean lab bench and had Mu Zhiyang and Wen Ming help him carefully clean it with alcohol before pulling out the two plastic ropes and observing them meticulously.
These were currently the most valuable clues found, apart from the body. Although they found these two plastic ropes early in the garbage-sifting process, an experienced police officer must realize that clues aren't linearly distributed.
Making full use of every clue you know about is the most basic respect for criminal investigation. Whether you receive a lot of clues and evidence at once or find a tiny bit by sheer luck, utilizing them as best as you can is the only thing a police officer can do and should do.
"Length 131 centimeters. Width 3 centimeters."
