When he arrived at the scene, Zhou Ta, who was wearing a duty uniform, was very motivated to take notes on the spot. Mu Zhiyang followed Jiang Yuan and squatted in front of the I-beam, bent over and took a look, and said, "How do you see if there are any fingerprints?" gone."

"You can use a magnifying glass or ultraviolet light to see." Jiang Yuan opened the inspection box he brought with him, and said casually: "In our current situation, it doesn't need to be so troublesome, just sweep the powder."

While talking, Jiang Yuan seemed to be ordering his troops, and from several gold, silver, black and gray bottles, he took out one containing gold powder, and took out a fluffy wine black brush.