When Huang Qiangmin came to the medical examiner's office, his head was still a little shaken.
He asked Jiang Yuan to do the backlog, but the general process for doing the backlog is really not like this.
To put it more realistically, if the provincial department now carries out a "100-day backlog attack operation" or the like, by the end of the operation, some of the backlog cases prepared in advance will not be activated.
The criminal suspect will not cooperate with your police actions.
And the current cases have become backlogged cases, which always have some difficulties.
Even if it doesn't, it should be there after it becomes a backlog.
Therefore, there is almost nothing that can be missed from the backlog.
Criminal police officers complain endlessly about backlogged cases. In some places, being assigned to investigate backlogged cases is as painful as being forced to wear tiny shoes.
It's actually quite painful.
This is like a salesperson who cannot get a deal with a customer despite trying every possible means. At this time, can a different salesperson solve the problem? There is a high probability that he still can’t get it done - this is a regular sales situation.
Huang Qiangmin is indeed optimistic about Jiang Yuan's ability, but Huang Qiangmin still doesn't quite understand that Jiang Yuan started making noises just half a day after he came back.
Ordinary land reclamation with large animals would take several months. Isn't it necessary to waste some feed, waste some labor, and toss for a while to get results?
Isn’t it normal for it to take three to five months to start a murder backlog?
If it can be done in just a few hours, do they have cat cakes and put them on the backlog?
It's not steak, it can be aged.
"What clues did you find?" Huang Qiangmin still had a serious face when he entered the door. Although he was indeed very curious, the dignity of the captain also had to be guaranteed.
If leaders lose their dignity, how can they manage their subordinates?
"Jiang Yuan found it, let him tell you." Wu Jun doesn't want to take credit. He doesn't have to consider the issue of dignity. He has already settled the treatment of his associate subjects, and has no desires or desires before retirement.
While Jiang Yuan was waiting for someone, he had already prepared the pictures and made them directly into PPT. At this time, he turned around the screen and said, "It's the 611 He Jingqin case from 13 years ago..."
"Oh, I remember, the scene was full of blood."
"Yes, I did an on-site reconstruction based on the blood stains." Jiang Yuan operated the PPT with his left hand and made slight gestures with his right hand.
Wu Jun was smiling across from him. Hearing this, he was surprised: "When did you do the on-site reconstruction?"
"When I was doing PPT, I did it by the way." Jiang Yuan replied.
Bloodstain analysis is a high-end gadget, and to play it well, you need to be at LV3 level.
However, for Jiang Yuan, who mastered blood stain analysis at LV5, reconstructing the scene was very basic.
I have seen all the pictures that need to be seen, and all the necessary information is available. It is a process of integrated analysis.
Jiang Yuan did not hesitate. He first showed a few photos and then said: "I will not go into details about the investigation of the crime scene and the examination report of the body. I will directly talk about the reconstruction of the crime process."
"Based on blood stain analysis, the murderer's crime process can be divided into four parts."
"Part One. The murderer held the victim hostage, and started injuring the victim with a knife for the first time at the fire door. There were superficial scratches on the victim's arm, and he probably performed low-intensity defense here. Door
The blood stains left on the wall behind the victim may have been caused by pushing. The main basis is: A. The blood stains formed by flowing from top to bottom on the front of the victim's jacket. B..."
"Part 2. The murderer took the victim hostage to the rooftop. The victim probably understood the murderer's purpose, and then resisted more fiercely, possibly accompanied by shouting. The murderer held a knife in his right hand and scratched the fatal wound from left to right.
, the wound was on the victim's neck, resulting in a splatter-like blood stain... Then, the murderer dragged the victim into the rooftop, causing drag injuries and a certain degree of resistance... The main basis..."
"Part Three. The murderer stabbed the victim again on the rooftop, causing the victim's death. Main basis: A, dripping blood stains... B, formation of blood pool... C, victim's footprints... D
, after the victim fell, splatter-like blood stains appeared again..."
"In the fourth part, the murderer began to wipe and clean the scene. Mainly to clean up the large pool of blood on the ground and close the door to the rooftop. I think this is to cover up the crime scene and avoid premature discovery.
It is inferred that after the murderer committed the murder, the first thing he considered was to run away. The main basis is..."
Huang Qiangmin was dumbfounded.
The captain of the county's criminal police brigade is here.
Looking at the photos, it was like seeing them with his own eyes, describing the on-site reconstruction of the criminals' actions. He had also watched performances before.
"Where did you learn this..." Huang Qiangmin really couldn't understand.
Jiang Yuan was silent for two seconds and said, "When I was studying, I liked to think about these things."
"Then you have really figured out something." Huang Qiangmin didn't know what to say. It's like the lead cow came out to work, but it ended up doing all the work of a production team. As a production team,
Captain, what should he do now?"
Jiang Yuandao: "I read the previous files, mainly looking for the murderer based on the victim's family background. I think that by changing the investigation angle, there may be a chance to solve the case..."
"Ex-convicts who ran away after committing crimes? This range is also very large." Huang Qiangmin instinctively looked for loopholes.
The backlog of murder cases has been started, and several police officers may have to be invested in it in the blink of an eye. It may take several months to solve the case, and preliminary arguments are indispensable.
Jiang Yuan then explained the previous body shape judgment based on the footprints, and then said: "I think we can narrow the scope a little first. If it doesn't work, we can expand the scope."
"How to shrink?"
"I think it can be assumed that the murderer has a history of sexual crimes and was released for a short period of time, such as one or two months, no more than three months. Then, he ran away very quickly and should have left on the same day.
, no more than the next day.”
"Why is the release time so short?" Huang Qiangmin thinks this question is the most important.
There are only a few prisons in the province, and with the criminals from Ningtai County, the number of sex offenders released after serving their sentences in the three months before the incident should be very small. Maybe only a few.
Among such a small number of people, if you find someone between 25 and 30 years old, the number will be even smaller.
After Jiang Yuan considered his words, he turned off the PPT, found a few more photos, and said: "From my understanding of the crime scene, the murderer's tidying up behavior was relatively calm. But his actions,
I think he is a little eager and a little unfamiliar. That is... he is very courageous and confident during the murder, but he is also anxious..."
What Jiang Yuan described at this time was already an overall judgment, rather than a separate point-to-point judgment: "I think this time is the first time the murderer committed a crime after being released from prison, so it is particularly special...
Impatient."
Huang Qiangmin understood. Although he himself did not know much about blood stain analysis, Jiang Yuan had already analyzed it to this extent, so Huang Qiangmin had no choice but to believe it.
"You investigate first and see how far we will go. I'll find two people for you." Huang Qiangmin thought for a while and called Wei Zhenguo over.
In this case, if Jiang Yuan had found fingerprints or DNA evidence, Huang Qiangmin would have immediately assembled a task force.
But for bloodstain analysis, Huang Qiangmin wanted to send two scouts out first.
This is also a common operation in the criminal police team. It can only be said that it is not special for Jiang Yuan.
This is what Jiang Yuan wanted. When Wei Zhenguo came over, the two discussed it and started making phone calls.
Prisons are managed by the judicial system, especially prisons outside the province, which are more troublesome.
This trouble didn't last long.
Two days later.
A list of only 8 people was placed on Huang Qiangmin's desk.
"Are there only a few suspects?" At this moment, Huang Qiangmin's level of attention was instantly raised.
Jiang Yuan nodded and said: "In this list, I think the first four people are the most likely ones. The last four people could have been screened out first and waited to see. But Captain Wei believes that there is no need to limit the scope so narrowly...
…”
"Old Wei is right. Wait until I call someone over." Huang Qiangmin stopped approving the documents at hand and directly called the back office to call someone.
While waiting for others, Huang Qiangmin said: "The list of suspects in the backlog of murder cases, 8 people are nothing, 80 people can be investigated directly. In this kind of case, we are not afraid of alerting the snake. With 8 people, we have enough manpower.
…”
"Yes." Jiang Yuan has also experienced several interrogations and arrests, and knows what the situation is like.
The police are not playing games when handling cases. They do not say that they have everything in place and then screen out the only result.
The four squadron leaders and team mates were called over at once and went directly to the conference room.
"Jiang Yuan, you will brief everyone on the case later." Huang Qiangmin said and got up and went to the conference room.
Jiang Yuan is also ready.
Regardless of whether you arrest 8 people or 4 people, the specific circumstances of the case must be informed to the executing police. Arresting always involves a certain degree of danger, and necessary information must be provided.
Jiang Yuan arrived in the conference room, released the PPT again, and reconstructed the crime scene more completely while operating it with one hand.
Compared with the time when he explained to Captain Huang Qiangmin, Jiang Yuan was better prepared this time and gave a more complete explanation.
Several team captains and team deputies were also veteran detectives, but after listening to Jiang Yuan's case report, they could not speak for a long time.
"Will all future cases be handled like this?" After a long time, Comrade Wu Junhao of the No. 1 Squadron couldn't help but speak.
"Of course it's impossible." Liu Wenkai, the captain of the Second Squadron, sighed and said, "No matter how good Shang K is, he won't seize Fenglou's market. Don't worry."
Everyone inexplicably agreed and felt a little bit of peace of mind.
