Chapter 721 Looking for traces
The red light spot was so penetrating that when you looked out from the darkness, your vision immediately became blurred.
Liu Sheng covered his eyes and raised the flashlight and waved it twice before the red dot on the opposite side moved.
"There are too many cameras here. Those who didn't know it would have thought they were targeted by snipers." Liu Sheng walked to the door and couldn't help complaining.
"There is no harm in having more evidence." Liu Jinghui agreed with Tao Lu's arrangement. Although it may not be useful in the court stage, when facing the scene, the ironclad evidence is like the "mountain" in the mountain, which is really meaningful.
Liu Sheng muttered, but didn't really want to object. Instead, he stood there dullly.
There was basically nothing left for him to do. This place is so remote that it is impossible to go back, so we can only stay there.
Liu Jinghui walked up and down, and it was when inspiration burst out in his mind that he stood next to Liu Sheng, thinking hard.
Standing across from each other and looking at the two people, I feel that both of their eyes are out of focus, but one person's brain is spinning crazily, and the other person's brain is lying flat.
Jiang Yuan first walked through the three floors, then returned to the first floor and began to change clothes and gloves.
Liu Sheng seemed to come to life at this time and asked quickly: "How is it?"
"There is a lot of evidence, and the evacuation was not in a hurry, but there was not much evidence cleared, and there was basically no systematic cleaning." Jiang Yuan said and glanced at Liu Jinghui.
Liu Jinghui was instantly activated and frowned: "That means this is probably not the first scene.
The deceased Zhang Lizhen fell into the water nearby, and the pollen information on her body also showed that she had entered the courtyard, but this does not mean that Zhang Lizhen must have died in the yard.
It might be that he died outside the yard, or he might have died outside on the grass or under the woods.
Judging from logical reasoning, the police followed the information about Zhang Lizhen's body and found the house here. And such a good, obviously expensive house was abandoned, and the calculated time was close to the time of Zhang Lizhen's death. Therefore, the relationship between Zhang Lizhen's death and the house must be inseparable.
Based on common sense, in this case, if Zhang Lizhen died in the house, it would be the most normal idea to do some cleaning to remove the evidence.
Therefore, if there are no traces of cleaning in the courtyard, it is very likely that the first scene is not in the courtyard, making cleaning unnecessary.
Of course, there is another possibility that the person in charge of the house did not know about Zhang Lizhen's death. However, based on common sense, it is difficult to believe that the person in charge of such a remote and special house would have such weak control ability.
On the other hand, even if the person in charge of the house did not know that Zhang Lizhen was dead and did not clean up the house, the murderer should still return to the scene and clean it up.
Liu Sheng also came back to his senses, thought for a while, figured it out, and asked further: "Actually, even if this is not the first scene and nothing happens, isn't it normal to clean it up?"
"Your question is very interesting. The person in charge has time to take away the picture frames and the like, so why don't you clean the room?" Liu Jinghui paused and said, "It's just for two reasons, either because it's not necessary or because I feel it is necessary. "
"No need to clean up? Someone has died. This reason is obviously inappropriate." Liu Sheng said.
Liu Jinghui nodded.
Liu Sheng continued: "Necessary means that the person in charge feels it is necessary to leave evidence?"
Liu Jinghui nodded slowly: "That's the only way to explain it."
The two of them looked at Jiang Yuan as they spoke. They are showing off their reasoning here, but the truth ultimately needs to be supported by evidence.
Jiang Yuan waved to a policeman with a camera, and then brought a spotter to start the investigation from bottom to top.
"First take the footprints on the ground." Jiang Yuan asked someone to turn on the survey light and then take the footprints one by one.
Soon, the investigation lights were turned on in the dark room.
For now, Jiang Yuan believes that the value of footprints is very great.
Footprints can not only determine a series of identity characteristics of the people present, but most importantly, they can also see whether there was any struggle, resistance, or dragging at the scene.
People are easy to die but difficult to kill. Even if the deceased is a woman, it is not easy to kill her cleanly. Although the previous reasoning and discussion had already indicated that the first scene was not indoors, it still had to be seen.
Moreover, behaviors such as fighting and dragging are seen because they are different from ordinary and more intense activities.
For Jiang Yuan, as long as there are footprints, less intense activities can actually be seen.
He has now developed the crime scene reconstruction (temporary +1) skill, which is equivalent to LV5 crime scene investigation. At the same time, he has a more advanced specialty, equivalent to LV6 crime scene reconstruction.
At this level, as long as you are willing to invest time and energy, you can not only see how and where the owner of the footprints walked, but you can even see what the owner of the footprints did before and after he landed.
A simple example, when there are traces of left and right twisting on a footprint, it means that the owner of the footprint may have turned.
Many human movements must have a foothold to exert force. As long as the ground conditions are good enough, these can all be seen. The dust that had accumulated since the residence had been closed for more than a year now became more conducive to the identification of footprints.
Jiang Yuan and others first built a Banqiao to collect and record the footprints layer by layer.
At the same time, Jiang Yuan took advantage of others to take the footprints and did another round of analysis, then walked around several more footprints and observed in a spiral.
I picked up some hair or dander and the like, and marked and photographed them separately.
For Jiang Yuan, the on-site survey itself is not difficult, but to organize it well, not only the survey stage must be methodical and organized, but also the later investigation stage and even the litigation stage must be provided at any time. Evidence support is the most difficult part.
As you can imagine, there were a lot of people living or visiting this house. To extract them all in an efficient and orderly manner would require a lot of work.
There were three floors, going up one by one, and when we came down to collect evidence, it was already dark.
After taking the footprints, take fingerprints and classify the various traces.
Normal on-site inspections do not actually do this. They usually only take key fingerprints and traces at key locations.
Otherwise, this electronic age is just that. 20 years ago, when paper materials were popular, the size of evidence would have become a problem.
This time the scene is different. Tao Lu and others, including Tao Lu, are inclined to obtain as much evidence as possible and target as many people as possible.
This work continued until night before most of the current survey work was completed.
Compared to the situation indoors, there are no valuable clues in the yard. More than a year in the woods and more than a year in the city are completely different concepts.
With so many microorganisms and all ecological niches fully filled, it is difficult to find fingerprints and footprints in the courtyard. Let alone using them to prove anything.
"Tao Zhi, the on-site investigation is complete." When Jiang Yuan took off his gloves again, it was already dark.
"Fingerprint identification and footprint identification have also been left to you?" Tao Lu asked.
Jiang Yuan nodded: "It can be done."
"Okay, then I'll get in the dog."
Forensic doctor Jiang nodded again.
Tao Lu took out his walkie-talkie and said, "Let the dog in."
Several fat and strong police dogs immediately appeared in front of Jiang Yuan and others.