"I'm tired, let's smoke a cigarette." After digging in the yard for a while, Wu Jun felt his back ached and got up without hesitation and went out to light a cigarette.
What he smoked this time was his own Liqun. It was very powerful, half a stick at a time, and it could numb himself.
Jiang Yuan came out and had a cigarette with him, and then said, "Why don't you just rest outside for a while, and we can just mess around inside."
"Okay." Wu Jun agreed unexpectedly.
Jiang Yuan was a little surprised. In his impression, Comrade Wu Jun worked hard and was generally reluctant to be lazy. Was it because he saw the miserable situation of the old man scavenging that he suddenly had a new interrogation of life?
Seeing Jiang Yuan's expression, Wu Jun laughed loudly and said, "Anyway, I'm just here to add to my head this time. Why are you working so hard?"
"No, you are so senior." Jiang Yuanyan comforted Old Wutou insincerely.
Wu Jun took a puff of cigarette and said with a smile: "Including you, there are three forensic doctors. Do you really want me to cut DNA?"
Jiang Yuan was embarrassed to say it again. Indeed, for the scene in front of him, although there was a lot of work, there was really no need to call two forensic doctors.
DNA testing materials can be made by on-site inspection. If the county's ones are difficult to use, they can apply for dispatch from the municipal bureau. Tests of this kind of diagnostic level will usually receive as much support as possible.
Of course, for now, Jiang Yuan and Wu Jun are actually doing this "as much as possible".
Jiang Yuan was probably chosen for his fingerprint technology. He was the champion of the province's fingerprint competition, and he solved 10 murder cases in one breath. It is conceivable that in the days to come, people will continue to invite Jiang Yuan.
of.
The main reason Longli County is so familiar with Ningtai County is that they know the relationship between Jiang Yuan and Wu Jun, and they are too embarrassed to invite Jiang Yuan instead of Wu Jun...
Comrade Wu Jun naturally plays a role. Anyway, it is always good to have one more forensic doctor and one more manpower.
But when it comes to the initial request, I still want to ask Jiang Yuan to do fingerprints and conduct an on-site investigation.
Wu Jun was definitely implicated.
Wu Jun also saw this clearly and had no intention of proving 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 nothing so hard.
"The Romance of Fairy Wood"
"I'm going to order some pork belly and chicken. If you're free, come over and eat together. The county will probably host a simple meal, or at most a simple buffet." Wu Jun finished smoking a cigarette and put the cigarette butt on himself.
Put it away and walk to the store as a car.
Jiang Yuan hurriedly took a step forward and said, "Then I'll try my best to get there. Can I get there?"
"Looking at the navigation, it's only a few hundred steps away. You have to put it in the parking lot when you drive, so it's just like taking a walk." Wu Jun waved his hand, said hello to the people in Longli County, and walked away on his own.
It is already off-duty time. Although the police are not working overtime, the people in Longli County are still not very good at managing the forensic doctors in Ningtai County.
In a blink of an eye, Wu Jun was already at the end of the alley, like a young lady relieving her worries.
Jiang Yuan returned to the yard and continued working.
All the bloody objects have been wiped off, and all objects judged to have come into contact with the murderer have been collected 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 UV light or the like.
, to find the fingerprint.
But on the other hand, sweat can also be used to extract DNA. This is a technology that has only been available in the past ten years.
Once the sweat is wiped off and used to extract DNA, the fingerprints will not be picked up.
Although there are some methods to extract sweat latent fingerprints without causing any damage, in general, the difficulty is higher. For example, Longli County’s own technicians basically have no ideas in this regard.
It's not that they don't understand the relevant technology at all, but there's a huge difference between having heard of it and doing it, doing it and mastering it proficiently. Especially this kind of fate is not a place for technicians to practice their skills at all.
Therefore, technicians who have not practiced normally will not try it at the death scene.
The technicians who were on hand to perform fingerprinting basically relied on dusting powder throughout the process.
Or looking at it from another perspective, if they are willing to make various attempts on a daily basis, 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 be the leader.
He did the fingerprints himself, took the fingerprints, took the photos, and then did the DNA.
As a result, the speed becomes even slower. Seeing that it is getting dark and the bright headlights are turned on, Jiang Yuan's work becomes more difficult. Ultraviolet lights and the like will be disturbed, making it difficult to take clear pictures.
The papillae and lines of fingerprints.
Jiang Yuan stretched and fell into deep thought.
Look at this mess!
Not to mention 72 hours, it’s a lot of work that can’t be completed in seven days.
To tell how many objects an old scavenger has in his yard, you can refer to news related to hoarding.
For example, an old man hoarded a large amount of express delivery and other items in a two-bedroom apartment. After the neighbors couldn't bear it, the property management team helped clean up the items and sent more than a dozen people. It took two days to clear the items out of the room.
What should be noted here is that more than a dozen people cleared the room and just moved the things out.
If these dozen people were transformed into technicians, and then they were asked to scan fingerprints, wipe DNA, and collect test materials on each object in more than one place, think about how long it would take.
After Jiang Yuan was busy for a day and a night, he finally realized:
Longli County here is responsible for the criminal investigation of on-site evidence collection, which is a bit silly.
Regardless of whether he liked stupid methods or was just really stupid, Jiang Yuan couldn't stand it any longer.
Only then did he remember the master who went to eat fat intestine, pork belly and chicken, and quickly made a phone call.
"Well, it tastes quite good. If you want to eat, you can go and eat by yourself. What they cook there is a midnight snack. I'll get some sleep and go over to help tomorrow morning." Wu Jundu muttered a few words and hung up the phone.
Only then did Jiang Yuan notice that it was already early morning.
I have never experienced this in Ningtai County.
However, it makes sense to think about it again. He is not from Longli County, so he naturally has to use it hard and squeeze it dry before talking about it.
"You're not going to take a rest either?" Jiang Yuan looked at the other technicians around him.
The technicians present were all older than him, and they all looked at Jiang Yuan with the expressions of stupid children. One of them said: "We have all changed shifts."
"Well...that's true." Jiang Yuan felt that he had been called out before, but it seemed that he had never been called out...
So, overall...he's quite 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. Only technicians with no authority or position could stay here with peace of mind.
At the scene, he was not even qualified to be scolded by his wife.
This also proves another point: the grassroots composition of ordinary county bureaus is composed of monk temples.
Although there are female police officers joining one or more of the monk temples every year, considering that every year there are fatalities and economic cases assigned by superiors, the female police officers will be scared to jump up and down when their hair falls out.
Jiang Yuan really couldn't do it anymore.
He exited the courtyard, took off his mask and gloves, and sat across from the courtyard, staring blankly at the courtyard.
This happens when people are too tired and don't even want to think about it.
The same is true for Jiang Yuan. He doesn't want to think about why an old man scavenging was beaten to death.
Conflicts that occurred during scavenging? Then why did it happen at his home? Moreover, the property was not damaged, and there were no signs of disturbance in the rooms inside.
It is more likely that the murderer came here to kill someone.
But still, is a little old man scavenging worth another murder? Why should it end like this?
This is the most difficult part of this case, and it is also why Longli County hurriedly called for reinforcements. Because unless technical means are used to point directly at the murderer, the usual tactics of breaking the case will not work.
Commonly analyzed interests: there is no interest; seeing wealth means there is no money; seeing color, there is no color either.
Jiang Yuan looked at the courtyard door, recalling the blood stains he had seen before, and subconsciously began to analyze it.
The murderer probably followed the old scavenger into the hospital, but he knocked it over after entering. This is because the blood stains at the beginning were mainly splashed on the ground, which was a top-down attack.
After that, the old scavenger did not resist further, but just ran away, and in the process of escaping, he knocked down many things, which covered the ground, forming a second wave of beatings...
Then, comes the third wave.
Jiang Yuan patted his forehead and continued to beat him. To a large extent, it was revenge and venting his anger. Who did the old scavenger offend?
Jiang Yuan picked up the phone and put it down again.
The criminal investigators in Longli County would not have thought of such a simple criminal investigation route. Although from the perspective of criminal science, they are quite stupid, but in terms of non-technical aspects, they would not be able to think of such basic content.
Jiang Yuan then extended his ideas to the fields he mastered and was good at...
A continuous beating and venting of anger, it can be assumed that the murderer will leave a lot of traces.
During strenuous exercise, sweat will drop, hair will fall, and dandruff will fly. If you hit hard, you may have a runny nose and sneezing. If it is revenge, you may cry and roar.
"I took revenge"?
But where are the traces?
In other words, with so many traces at the scene, how to prove which trace belongs to the murderer and not to the scavenged items?
Weapons and bloodstains!
These two things must not be brought by scavenged items.
Now that the murder weapon has not been found, the first choice is blood stains.
Most of the blood stains on the items were sampled, and some of them were made by Jiang Yuan.
As for the blood stains on the walls and floors other than items, they did not fall within the scope of Jiang Yuan's previous work.
The question returned to the scene Jiang Yuan saw when he first arrived and entered the building. At that time, he was looking at the blood stains on the wall. Wang Lan, a forensic doctor from Qinghe City, said at the time that "the blood stains were sampled."
Jiang Yuan now recalled the scene at that time. The fatigue of the whole day and night first came to mind, and a thought came to his mind: given the level of technicians in Longli County, what does it matter whether they sampled these blood stains or not!
Might as well do it again myself.
It’s more cost-effective than wiping down everything in the yard!
