Chapter 721 Searching for Traces

The red light spot was very penetrating. Looking out from the darkness, the vision immediately became hazy.

Liu Sheng shielded his eyes and waved the flashlight twice, and the red spot on the opposite side moved.

"There are too many cameras here. If you don't know, you might think you are locked by a sniper." Liu Sheng walked to the door and couldn't help complaining.

"It won't hurt to have more evidence." Liu Jinghui agreed with Tao Lu's arrangement. Although it might not be useful in the court stage, when it comes to Jing, the "mountain" in the ironclad evidence is really meaningful.

Liu Sheng muttered, but he didn't really want to object. Instead, he stood there a little depressed.

There was basically nothing for him to do. This place was very remote, and it was impossible to go back, so he could only guard it.

Liu Jinghui walked up and down, and when inspiration burst out in his mind, he stood next to Liu Sheng and thought hard.

Standing opposite and looking at the two people, I felt that their eyes were out of focus, but one person's brain was spinning wildly, and the other person's brain was lying flat.

Jiang Yuan first walked around the three floors, then returned to the first floor and began to change his clothes and gloves.

Liu Sheng seemed to come alive at this time and asked hurriedly: "How is it?"

"There is a lot of evidence. The evacuation was not rushed, but not much evidence was cleared. Basically, there was no systematic cleaning." Jiang Yuan said and glanced at Liu Jinghui.

Liu Jinghui was also instantly activated, frowning: "That means this is probably not the first scene.

The place where the deceased Zhang Lizhen fell into the water was nearby, and the spore information on her body also showed that she had entered this courtyard, but this does not mean that Zhang Lizhen must have died in the courtyard.

It is possible that she died outside the courtyard, or on the grass outside, or under the woods.

Judging from logical reasoning, the police found this house by following the information of Zhang Lizhen's body. Such a good house with obviously high cost was abandoned, and the time was close to the time of Zhang Lizhen's death. Then, Zhang Lizhen's death must be related to the house.

Inferring from common sense, in this case, if Zhang Lizhen died in the house, it would be necessary to clean it up. Eliminating evidence is the most normal way of thinking.

Therefore, if there are no signs of cleaning in the house, it is very likely that the first scene is not in the house, making cleaning unnecessary.

Of course, there is another possibility that the person in charge of the house does not know about Zhang Lizhen's death. But according to common sense, it is hard 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 then did not clean the house, the murderer should return to the scene and do a cleaning.

Liu Sheng also came back to his senses, thought for a while, figured it out, and asked further: "In fact, even if this is not the first scene and nothing happened, isn't it normal to clean it up?"

"Your question is very interesting. The person in charge has time to take away the picture frame and the like, why not clean the room. Liu Jinghui paused and said: "There are only two reasons, either you think it is unnecessary or you think it is necessary."

"No need to clean? 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 explanation."

The two looked at Jiang Yuan. They were showing off their reasoning here, but the truth, in the final analysis, must be supported by evidence.

Jiang Yuan waved and called a policeman with a camera, and then brought a spot investigator, and began to investigate from bottom to top.

"First, take the footprints on the ground." Jiang Yuan asked people to turn on the investigation light, and then take footprints one by one.

Soon, the investigation light was 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, it can see whether there was a fight, resistance, dragging, etc. 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 discussion has tended to be that the first scene is not indoors, it still needs to be seen before it counts.

Moreover, the reason why behaviors such as fighting and dragging can be seen is that they are different from the usual and are more intense activities.

For Jiang Yuan, as long as there are footprints, less intense activities can actually be seen.

He has now opened the skill of crime scene reconstruction (temporary +1), which is equivalent to a higher-level specialty of crime scene reconstruction at LV5 while investigating the crime scene at LV6.

At this level, as long as you are willing to invest time and energy, you can not only see how the owner of the footprints walked and where they walked, but also what the owner of the footprints did before and after landing.

A simple example is that when a footprint shows traces of twisting left and right, it means that the owner of the footprints may have turned.

Many human actions require a foothold, and as long as the ground conditions are good enough, these can be seen. The dust accumulated in this house after more than a year of closure has become more conducive to footprint identification.

Jiang Yuan and others first built a plank bridge to collect and record the layers of footprints.

At the same time, Jiang Yuan took advantage of the fact that others were collecting footprints to do another round of analysis, and then circled around several footprints, observing them in a spiral circle.

Some hair or dandruff was picked up, and they were also marked and photographed separately.

For Jiang Yuan, this on-site investigation itself was not difficult, but to organize it well, not only to be organized in an orderly and organized manner during the investigation stage, but also to provide strong evidence support at any time during the later investigation stage and even the litigation stage, was the most difficult part.

It can be imagined that there were many people who originally lived or came and went in this house. To dig them all out efficiently and systematically, the workload would not be small.

Three floors, going up one floor at a time, and then collecting evidence, it was dark.

After collecting footprints, fingerprints were collected, and then various traces were classified.

Normal on-site investigations would not actually be done this way. Usually, only key fingerprints and traces were collected at key locations, etc.

Otherwise, it would be fine in this electronic age, but 20 years ago, when paper materials were popular, the volume of evidence would become a problem.

This time, the scene is different. Including Tao Lu and others, they tend to obtain as much evidence as possible and lock as many people as possible.

In this way, it was not until night that most of the on-site investigation was completed.

Compared with the situation indoors, there are no valuable clues in the yard. More than a year in the woods is completely different from more than a year in the city.

With so many microorganisms and all ecological niches fully filled, it is difficult to find fingerprints and footprints in the yard. Not to mention using them to prove anything.

"Tao Zhi, the on-site investigation is completed." When Jiang Yuan took off his gloves again, it was already dark.

"The work of fingerprint identification and footprint identification is also handed over to you?" Tao Lu chased.

Jiang Yuan nodded: "It can be done."

"Okay, then I'll go in."

Forensic doctor Jiang nodded again.

Tao Lu took out the intercom and said, "Let the dogs in."

Several fat and strong police dogs immediately appeared in front of Jiang Yuan and others.