civil forensic

Chapter 345 Small Dose

Jiang Yuan spread some photos on the table, looked at the photos and became meditative.

This is his usual operation, and many of his backlogs start from photos.

The other policemen in the room either looked at the photos, or did their own thing, or just played with their mobile phones and took a break.

Song Jinyou paid attention to Jiang Yuan's expression, and also stood in front of him.

They are all photos I have seen, some of them were even taken by him, Song Jinyou is not sure if Jiang Yuan can see something...

"I see that among the onlookers, many people appear repeatedly..." Mu Zhiyang said tentatively.

His guess is the simplest and most natural.Regardless of the return of criminals to the scene of the crime, ordinary people will be particularly concerned about the progress of the investigation of the case after committing a crime.

This is a natural approach. Having a criminal case under your name will become the biggest thing in your life for most people, and it is impossible not to care about it.

Listening to Mu Zhiyang's words, Song Jinyou glanced at Jiang Yuan, and said, "The photos in the photos are all from the village, and they were all taken two or three days after the incident."

Mu Zhiyang unconsciously let out an "oh" and understood.

The photos of the scene were taken two or three days apart, and each photo was taken a few days apart. At this time, the accuracy of forcibly saying that there is a criminal inside is really too low.

If there is something inappropriate at the scene, the criminal has two or three days to go back and do things again.As for the villagers watching, the possibility of being curious is very high.After all, it is a village far away from the city. It is normal for a group of outsiders, including the police, to come and watch.

Furthermore, the time of shooting cannot completely cover the time of onlookers. In this way, it is really meaningless to speculate or analyze based on the crowd of onlookers captured in the photos.

"In this case, the criminal will still have a chance to destroy the evidence." Tang Jia added.

Song Jinyou nodded: "This is a very troublesome point. The environment of Lanzhu Village is very closed, and we can't stand guard if we want to. As long as outsiders enter the village, they will be noticed. The news will soon spread throughout the village. There is a little possibility of hiding None of the sex."

The expressions of the few policemen present became more serious.

Although it is said that there must be traces where they have passed, but if the scene is destroyed once, or even destroyed twice, the difficulty of investigation will be too high.

In other words, for ordinary surveyors and technicians, the traces of where they have been are indeed different.

This is like changing a question, changing it again, changing it again, and then asking candidates to do the question, the later the question, the lower the scoring rate.

After all, there are only a small number of masters. For the technicians of the police station or the county bureau, if the difficulty reaches this level, it is beyond the standard.

Everyone looked at Jiang Yuan again.

Jiang Yuan smiled, found a few photos of the footprints at the scene from a bunch of photos, and said: "My idea is that face recognition is unreliable, but the footprints at the scene are rare after all, and we can still analyze them."

Surveillance video and even DNA are not particularly useful in a rural environment, which decomposes very quickly in a rural environment.

However, footprints are relatively easy to use in rural or wild environments.

On the one hand, there are many places with soft soil in the countryside, enough to keep footprints, on the other hand, dust can also leave a lot of footprints.

In the photos taken by Song Jinyou, there are a lot of footprints in the photos beside the fish pond, pigpen, and donkey pen.

Jiang Yuandao: "Compared with the photos of the onlookers, the footprints are closer to the scene. I look at the photos of the three cases, and the footprints of the fish pond case are the most messy. It should be several days in a row, and people have been to the scene. , but the footprints of the dead pig and donkey cases are well preserved, although there are footprints for many days, but they can basically distinguish the footprints of the day when the crime happened, and the footprints of the next few days."

"Hey, can you tell the difference?" Song Jinyou was shocked, and asked: "The same person, can you tell the difference between the footprints stepped on today and the footprints stepped on tomorrow?"

"It's a few days away. Under this environment, there is a high probability of distinguishing it." Jiang Yuan said: "This kind of footprints on the soft ground, you can see the hardness of the edges and the grayscale of the color, which are relatively easy to distinguish of……"

Song Jinyou chuckled and didn't even bother to look.It's easy to distinguish a woolen thread. If it is easy to distinguish, the county's trace inspection will jump off the building directly.

Wang Zhong next to him also let out a silly laugh.He is a trace examiner, the type of footprint identification LV0.1. He even has to carefully distinguish the traces of pig's hooves and donkey's hooves to make a judgment.

"All in all, through the footprints, we can screen out a few people." Jiang Yuan is not going to give them a lecture.

It is meaningful to give lectures to people who know what to do, for Song Jinyou - he doesn't need to persuade Song Jinyou, anyway, he just gives orders, so there is no need to explain so much.

"This footprint is the most frequent." Jiang Yuan pulled a photo and drew a circle on one of the footprints with a red pen.

"The frequency of this footprint is also very high, and there are many footprints."

"This also happens every time, probably the third most frequently."

"And this, it happens every time."

Jiang Yuan drew a total of four footprints, and continued: "The first one is a woman, aged 46 to 47. She is 156 cm tall and weighs about 130 catties."

"The second is a male, 51 years old, 165 cm tall and 150 catties in weight."

"The third is a male, 32 years old, 172 centimeters tall and weighs about 170 kilograms."

"The fourth is a woman, aged 52 to 54, about 155 centimeters tall and weighing 120 kilograms."

As Jiang Yuan said, Tang Jia took notes beside him.

After finishing speaking, Jiang Yuan read it again, and pointed again: "From 1 to 4, the foot lengths are 21 cm, 24 cm, 24.5 cm, and 22.5 cm."

Tang Jia recorded it according to his words.

Song Jinyou frowned and looked at the photo: "Can you tell the length of the footprints directly from the photo?"

"It's the length of the feet, not the length of the shoes, that is to say, it's not the length of the shoes. Remember to measure it when you're looking for someone." Jiang Yuan paused, then pointed to number four, and said, "This one has fingers eversion, There are some serious ones, remember."

"Okay." Tang Jia quickly stated.

Jiang Yuan then took a photo, handed the paper to Song Jinyou and said, "Thank you, Director Song, send someone to check these four people, or bring them here for interrogation."

"Okay, okay." Song Jinyou understood, did this reduce the suspects to four?
If this is the case, the case becomes very simple.

There are only a few hundred people in a village, so it is very easy to screen out 4 people based on height, foot, length and weight.

Similarly, if four people can be locked down in the end, it will not be too difficult to find out the real criminal.

Song Jinyou immediately ordered a few people to go on a business trip, and together with a few people from Jiang Yuan's side, they went straight to Lanzhu Village.

"The road is better now, but I don't think there will be any news until tomorrow. Let's rest and have a meal." Song Jinyou's politeness went up three levels.

Hearing that Jiang Yuan can solve the case, seeing that Jiang Yuan can solve the case, and being solved by Jiang Yuan, this is a three-level rise.

Song Jinyou looks at Jiang Yuan now, just like looking at the Wishing Bodhisattva.

The next day.

Eight police officers brought back four suspects.

Meng Chengbiao went back with him, and before going to the interrogation, he reported to Jiang Yuan: "There is a high probability that it is No. [-] Gan Jingying."

Jiang Yuan only asked: "Could it be that many people committed the crime?"

"No. The rat poison found in her house, and the chickens, ducks, geese, and pigs in her house have never been poisoned. She also has grudges with various victims. In addition, Gan Jingying has an extreme personality and gets along with everyone. I won’t come.” Meng Chengbiao said the reason, and then said: “I will also pay attention to interrogation during the interrogation later.”

Jiang Yuan nodded, he still trusted Meng Chengbiao's judgment in this regard.

Meng Chengbiao continued: "The other three suspects have relatively good reasons for appearing at the three crime scenes. Only Gan Jingying didn't go to watch the excitement the first two times, but there are footprints left at the scene..."

Meng Chengbiao went to the interrogation with a pre-set goal, which was not particularly in line with the standard.But in the world of criminal cases, there are no standard things.

Gan Jingying had little confrontation, so she explained the crime process.

During the confession, Gan Jingying cried bitterly, denouncing the villagers for oppressing and bullying her...

Jiang Yuan and the others were in the monitoring room, feeling a little bored listening.

As is the case with most criminal suspects, they usually try to justify their actions.

A little bit of common knowledge, most criminals think of themselves as good people.

Therefore, if self-identity is used as the standard, the education of most parents is very successful.

An old policeman like Song Jinyou's sympathy threshold is even higher. After listening for a while, he said boringly: "Dare to love is a coward, only dare to poison in small doses."

"No wonder you couldn't detect the poison when you went there." Jiang Yuan also understood that this Gan Jingying had poisoned these dead things in recent months, including the previous few years.But if they are not satisfied with someone, they throw a little bit of tetramine, and often mix it into the feed.

In this case, some livestock were poisoned to death, such as the recent pigs and donkeys, but there were also other livestock that were not poisoned to death.

And when Song Jinyou sent someone over, then extracted it, brought it back, and then went to the county bureau to queue up for testing, basically nothing could be detected.Of course, the technical level of the Ningtai County Bureau is too high. If someone is dead, the test method will be different.

"Okay. Let's arrest this person next." Jiang Yuan said as he exported a file, which was a small case he had today and last night.

(End of this chapter)