civil forensic

Chapter 133

"I'm tired, let's smoke a cigarette." After digging in the yard for a while, Wu Jun felt back pain and got up without hesitation to go out to light a cigarette.

This time he smoked his own Liqun, which was powerful, half a stick at a time, and could anesthetize himself.

Jiang Yuan came out to accompany him for a cigarette, and said again: "Why don't you just rest outside for a while, and we can just hang out inside."

"Okay." Wu Jun unexpectedly agreed.

Jiang Yuan was a little surprised. In my impression, Comrade Wu Jun is still working hard, and generally he is not willing to be lazy. This is because he saw the tragic situation of the old man who scavenged and suddenly re-tortured his life?

Seeing Jiang Yuan's expression, Wu Jun laughed haha, and said, "Anyway, I'm just adding to my head this time, so why do I work so hard?"

"No, you have such old qualifications." Jiang Yuanyan comforted the old Wu head insincerely.

Wu Jun took a breath and said with a smile, "Counting you, there are three forensic doctors. Could it be that I'm really called to cut the DNA?"

Jiang Yuan didn't have the nerve to say it again, indeed, in the scene in front of him, although there was a lot of work, there was really no need to call two forensic doctors over.

The DNA test materials can be done by spot surveys. If the county's ones are not easy to use, they apply for dispatch from the city bureau. Cases of this kind of homicide level usually get as much support as possible.

Of course, as far as the current situation is concerned, Jiang Yuan and Wu Jun are actually "as far as possible".

Jiang Yuan should have been favored for his fingerprint technology.The champion of the province's fingerprint competition, and the one who solved 10 homicide cases in one go, it is conceivable that in the days to come, people will continue to invite Jiang Yuan.

The main reason Longli County is too familiar with Ningtai County is that they know the relationship between Jiang Yuan and Wu Jun, so they are embarrassed to invite Jiang Yuan instead of Wu Jun...

Comrade Wu Jun naturally has a role to play. Anyway, it is good to have one more forensic doctor and one more manpower.

But when it comes to the original appeal, I still want to ask Jiang Yuan to do fingerprints and on-site investigations.

Wu Jun must have been implicated.

Wu Jun also saw this clearly, let alone trying to prove himself.

His skills have already matured, and he will only continue to decline in the future. He will go to other counties to work as a basic labor force, and do what he does so hard.

"I'm going to order a pork belly chicken with fat intestines. If you are free, come and have it together. The county probably serves a simple meal, and at most a simple buffet will be enough." Wu Jun finished smoking a cigarette, and put the cigarette butt away Put it away, and walk to the shop in a hurry.

Jiang Yuan hurriedly took a step, and said: "Then I will try my best to go there. Can I go there?"

"Looking at the navigation, the distance is only a few hundred steps. If you drive in the parking lot, it's like a walk." Wu Jun waved his hand, greeted the people in Longli County, and wobbled away.

Now it was off-duty time. Although the police did not work overtime, the people in Longli County were still not very good at managing the forensic doctors in Ningtai County.

In a daze, Wu Jun was already at the end of the alley, like a little lady who relieved her worries.

Jiang Yuan returned to the yard and continued to work.

The bloody objects have been wiped, and the objects that are judged to be in contact with the murderer have also been taken for inspection. Next, Jiang Yuan's task is to extract fingerprints.

Extracting fingerprints and extracting DNA are sometimes in conflict.For example, the so-called sweat latent fingerprints are fingerprints formed by sweat. Unlike blood fingerprints, which can be seen at a glance, they need to be looked after with ultraviolet lamps to find the fingerprints.

But on the other hand, sweat can also be used to extract DNA, which is a technology that has only been available in the last ten years.

Wipe off the sweat and use it to extract DNA, and the fingerprints will not be mentioned.

Although there are some methods that can extract sweat latent fingerprints without injury, in general, the difficulty will be higher.For example, Longli County's own technicians basically have no idea in this regard.

It's not that they don't understand the relevant technology at all, but there is a big difference between hearing about it and doing it, and doing it and mastering it proficiently.Especially this kind of murder case is not a place for technicians to practice at all.

Therefore, technicians who have not been trained usually will not try it at the murder scene.

The technicians who were engaged in fingerprinting basically relied on the rhythm of dusting the whole process.

Or look at it from another angle, if they are willing to make various attempts in daily life, willing to participate in various trainings, and actively improve themselves...then the positional ability itself will be different.

In Longli County, it was not Jiang Yuan's turn to guide him.

He did the fingerprints himself, and after the fingerprints and photos were taken, he did the DNA.

In this way, the speed became even slower. Seeing that it was getting dark and the bright headlights were turned on, Jiang Yuan's work became even more difficult.Ultraviolet light and the like will be disturbed, and it is not easy to take pictures of the papillae and lines of fingerprints.

Jiang Yuan stretched his waist and fell into deep thought.

Look at this mess!
Not to mention 72 hours, it's a job that can't be done in seven days.

To tell how many items are in the yard of a scavenger old man, you can refer to news related to hoarding.

For example, an old man hoarded a large amount of couriers and other items in a two-bedroom, one-living room. After the neighbors couldn't bear it, the property helped clean it up and sent more than a dozen people. It took two days to clear it out of the room.

What should be noted here is that more than a dozen people cleared it out of the room, just carried the things out.

If these dozens of people are transformed into technicians, and then let them scan fingerprints, wipe DNA, and take inspection materials for each object, there is more than one place, think about how long it will take.

After a busy day and night, Jiang Yuan finally realized:
Here Longli County is responsible for the criminal investigation of on-site evidence collection, which is a bit silly.

Regardless of whether he likes stupid methods or is really stupid, Jiang Yuan can't bear it anymore.

Only then did he think of his master who was going to eat fat intestines, pork belly and chicken, so he hurriedly made a phone call.

"Well, the taste is quite good. If you want to eat, you can eat it by yourself. The supper is made there. I will sleep again and help out tomorrow morning." Wu Jun muttered a few words and hung up the phone.

Only then did Jiang Yuan notice that it was already early morning.

I have never survived like this in Ningtai County.

However, it is reasonable to think about it again. He is not from Longli County, so naturally he has to use it hard and squeeze it dry.

"Don't you guys go to rest?" Jiang Yuan looked at the other technicians around him.

The technicians present were all older than him, but Qi Qi looked at Jiang Yuan with the expression of looking at a silly child, and said humanely: "We have all changed shifts."

"Well... That's true." Jiang Yuan felt that he had been called out before, but he didn't seem to have been called out...

So, all in all... he's kind of stupid.

"Let's take a break, let's have supper together later." All the technicians present were ordinary technicians. Those with some leadership positions and authority had already gone home to be scolded by their wives. At the scene, I didn't even have the qualifications to be scolded by my wife.

This also proves another point, the grassroots of ordinary county bureaus are composed of monk temples.

Although there are female police officers who join one or more monk temples every year, considering that there are murder cases and economic cases assigned by superiors every year, when the hair falls out, the female police officers will also be frightened and jump up and down.

Jiang Yuan really couldn't do it anymore.

He withdrew from the yard, took off his mask and gloves, and sat across from the courtyard, looking at the yard in a daze.

This happens when people are too tired, and they don't even want to move their minds.

The same is true for Jiang Yuan, he is not willing to think about why an old man who scavenged waste was beaten to death——

Conflicts arising from scavenging?Then why did it happen in his home.Moreover, the belongings were not damaged, and the rooms inside did not even show signs of being turned over.

It is more likely that the murderer came here for murder.

But still, is it worth a murder for a little old man who picks up waste?Why is this.

This is the most difficult part of this case, and it is also why Longli County hastily called for reinforcements.Because unless technical means are used to directly point to the murderer, the usual strategies for solving crimes will not work.

Common analytical interests?There is no interest;There are no possessions; lust?There is no color either.

Jiang Yuan looked at the courtyard door, recalling the bloodstains he saw before, and subconsciously started to analyze.

The murderer was probably admitted to the hospital with the old man who picked up waste, but he turned it over after entering. This is because the blood at the beginning was mainly splashed on the ground, and it was a top-down attack.

After that, the old man who scavenged waste did not resist further, but fled, and in the process of escaping, he knocked down many things, and these things covered the ground, forming a second wave of beatings...

Then, came the third wave.

Jiang Yuan patted himself on the forehead, and the continuous beating, to a large extent, was revenge and venting anger. Who did the old man offend?

Jiang Yuan picked up the phone and put it down again.

For such a simple criminal investigation route, the criminal investigators in Longli County would not have missed it.Although from the perspective of criminal science, they are quite stupid, but the parts other than technology are not so basic that they can't think of it.

Jiang Yuan further extended his ideas to the fields he has mastered and is good at...

A continuous beating and venting, it can be assumed that the murderer will leave a large number of traces.

During strenuous exercise, the sweat will drop, the hair will fall, the dandruff will fly, and you may have a runny nose and sneeze if you are beaten hard. If you retaliate, you may cry and roar twice. "I got revenge"?
But where are the traces?
In other words, with so many traces at the scene, how to prove which trace belonged to the murderer and not from the scavenged items?
Weapons and blood!
These two things must not be brought about by scavenged items.

Now, the murder weapon has not been found, so the first choice is blood.

Most of the blood stains on the items were sampled, and some of them were made by Jiang Yuan.

As for things other than items, the blood on the walls and the ground did not belong to Jiang Yuan's previous work.

The question came back to the scene that Jiang Yuan saw when he just arrived. He was looking at the bloodstains thrown on the wall at that time. Forensic doctor Wang Lan from Qinghe City said at that time, "the bloodstains have been sampled."

Jiang Yuan now thinks back to the scene at that time, the exhaustion of the day and night came to his mind first, and a thought could not help but arise in his mind: As far as the level of the technicians in Longli County is concerned, it doesn't matter if they sample the blood!
Might as well do it all over again.

Nothing is more cost-effective than wiping all the items in the scavenger yard!
(End of this chapter)