Jiang Yuan said "Yes" and said: "It suddenly occurred to me that the direction of the murderer's coming and going can be compared with the trace evidence in the travel bag. Although I have passed it before, I will guarantee it again."

Wang Lan didn't understand for a while and asked: "How to compare?"

"The outermost side of the travel bag containing the corpse is not only heated, but also has some wear and tear. If you look closely, it has holes. And it is heated at the exhaust pipe, so it must be very close to the ground. Therefore, the inside of the travel bag,

The dust on the outside of the red and blue checkered bags is likely to come from the driving road." Jiang Yuan has now entered the state of on-site investigation, and his words are not only clear, but also the operation is extremely standard.

Just by looking at his actions, several people were subconsciously convinced.

Forensic doctor Zhai came over to take a look and asked seriously: "How do you use this dust?"

"Measure the ingredients and compare trace evidence." Jiang Yuandao.

"The ingredients have been measured, what next? Who can we compare it with?"

"The soil composition of the road to the south of Zifeng Town is definitely different from that of the road to the north." Jiang Yuan had observed this when he came in. At this moment, he said: "Most of the coal in Zifeng Town is sent to the south.

Now the coal mines have basically stopped operating, but there are still small coal mines secretly producing coal, so the coal in the south will have more ingredients. In the north, the clay fields are still producing, and there are fertilizer factories and pesticide factories. I don’t know the specific ingredients on the ground.

But I think the north and the south will take samples separately and compare them in the laboratory, and we will definitely find differences."

Forensic Doctor Zhai nodded slowly. This idea was very clear once it made sense.

Jiang Yuan looked at the situation and said: "You have to urge the trace evidence laboratory to produce these pieces of evidence first. Otherwise, if you wait normally, you will have to wait for a long time."

Trace physical evidence has to be processed in the provincial department's laboratory. There is a lot of sorting and the speed is slow. Someone needs help to jump in line.

Forensic Doctor Zhai understood and immediately said: "Then let's go to the north and south roads to take samples, and I'll find someone to send them there."

To do this kind of thing, Jiang Yuan did not rely on others and went to get it himself.

Looking back, several people studied the wear and tear of the outer travel bag and gave up decisively. Forensic Doctor Zhai came forward to shake things up again.
Chapter completed!