Captain Bai felt a little guilty after being told by Ou Huang Qiangmin. He laughed loudly and said, "You can solve the case, so you can say anything. If the case cannot be solved, don't brag about it."
Huang Qiangmin crushed the flower in his hand to death in the arms of Chlorophytum, lit another one, and said with blurred eyes: "Old Bai, I didn't have much contact with you before, and I didn't realize that your mouth is really serious."
It’s so hard.”
"If you win, you can say whatever you want. If you can't solve the case, get out of here." Captain Bai's eyes became particularly arrogant, and he was straightforward in provocation. Although he could see through it at a glance, he was still very unhappy.
Huang Qiangmin laughed: "If you had a stronger IQ, you should know that the reason why Jiang Yuan came to your Shiting County is because we have constantly solved the backlog of murder cases... Bai Jian has solved the most murder cases in his life.
Is the quantity as high as what our Jiang Yuan has broken in two years?"
Captain Bai never loses even if he loses, so Ou said without hesitation: "No need to compare, the number of murder cases I have solved in my life may not be as many as your Jiang Yuan solved in a year... But...
..."
Huang Qiangmin's expression originally softened, but when he heard the word "but", he could only look helplessly at Captain Bai Jianbai.
Bai Jiandao: "Even if you solve many cases and solve countless cases, it doesn't mean that you can solve this case. Let me put it this way, no one in the world dares to say that he can solve all the cases.
It’s broken, don’t you think so?”
Huang Qiangmin was stunned when he heard this. He had no confidence to bite such a tough mouth if it was thrown to him.
Liu Jinghui listened with interest and said with a smile: "Baida, logically speaking, what you just said is a change of concept."
Captain Bai was too embarrassed to argue with Liu Jinghui from the provincial department, so he kept his mouth straight and encouraged himself.
At this time, Jiang Yuandao said: "Bai Da, find two criminal policemen from the special task force of the Majiazhuang family murder case, the kind who will follow it from beginning to end."
Bai Jian said: "That's me. What do you want to ask?"
"Have you traced the footprints on the window?" Jiang Yuan took out a photo, which was a close-up of one-fifth of the footprint. It was almost the middle part of a shoe that had stepped on the window frame, leaving
traces below.
Bai Jian knew what Jiang Yuan was asking as soon as he heard it, and said, "We asked someone to look at the footprints at the beginning. They are too small to be used as evidence."
The entire crime scene was a mess. It was impossible to tell which footprints belonged to the villagers, which belonged to the murderer, and which to the later police station police and joint defense team members. Only one-fifth of the footprints on the window were basically
It's definitely the murderer.
This is a typical footprint location for burglaries. Shiting County’s trace inspection team also tried its best to take out a relatively complete footprint.
However, due to problems with the construction of the window frame, it itself was very small and ultimately failed to function.
Similar to fingerprints, footprints also need to be of a certain size and have certain characteristic points for comparison.
One-fifth of the footprints are only the middle part of the shoe, which in the eyes of normal footprint experts is basically evidence of waste.
Unless it’s LV5!
Jiang Yuan had looked at the footprints carefully just now, so he picked up another photo from his hand, put it in a row with the one-fifth footprint, and said: "These two footprints are together. They belong to the same person.
footprint."
The two photos are both of footprints, one is only one-fifth of the normal size, and the other is complete.
Bai Jian was stunned for a moment, and his expression gradually changed to: Are you kidding me?
Because in the two photos in front of me, the former is the footprints of sports shoes, and the latter is the footprints of old cotton shoes.
The shoes are all different, they are said to be the footprints of the same person...
Jiang Yuan explained on the spot: "I think the murderer changed his shoes after completing the crime."
Now, not only Bai Jian, but also everyone else in the office crowded over.
Changing shoes in the middle of committing a crime has been heard but rarely seen.
Huang Qiangmin also pretended to be calm and snorted, but he was also curious in his heart. To be honest, he had not seen many difficult cases. He was afraid that half of the difficult cases in his life might be followed Jiang Yuan.
Yes. There is no other way. The murderer of this kind of case cannot concentrate on going to Ningtai County to commit crimes. Only policemen like Jiang Yuan who commit crimes on the fly can be well-informed.
Jiang Yuan took a third photo, which was a smeared blood stain, numbered 277.
Jiang Yuan wrote the number in his notebook and said, "The murderer probably stepped on blood. In order to avoid leaving too obvious traces, the murderer took off his shoes here and put on a pair of the victim's shoes."
Jiang Yuan began to post a large number of photos, including photos of old cotton shoes and sneakers indoors.
Previously, Bai Jian and other criminal policemen in Shiting County had considered investigating cases based on the direction of the footprints, but there were too few clues and too many footprints.
Ma's yard is made of hard soil. From the hard soil to the tiles in the living room, a large number of footprints are left, but the clarity is not high.
From the one-fifth of the footprints on the window frame to the sneakers on the ground, it is no exaggeration to say that even if you don’t have the LV5 footprint identification skills, you must at least have high-level LV3 skills, and this step is the most important step in Shannan Province.
Some footprint experts cannot achieve this.
If it is a super serious case and there are no clues at all, and you must rely on footprints, you can package, classify, and compare all the footprints in the yard. Then find a high-level LV3 footprint expert who can also handle this case.
Just like what Jiang Yuan did before, the whole process was cumbersome and time-consuming.
However, Jiang Yuan doesn't have to work so hard now. The newly developed LV5 footprint identification will come into play when encountering such difficult footprints.
And this step is the most important 0-1.
In contrast, everyone pays more attention to and is more curious about changing shoes, but it is 1-2, which can be easily judged with a low-level LV3.
Immediately afterwards, Jiang Yuan posted a few more blood-stained photos and said:
"The murderer first entered the house wearing his sneakers, but not long after entering, he met the victim Ma Jun. Ma Jun probably didn't realize that someone was breaking into the house. The murderer killed the victim Ma Jun at a very fast speed. After that, he
He took off his own shoes, took out a pair of Ma Jun's shoes from the shoe cabinet not far away, continued the attack, and finally took his own shoes and left."
"The shoe sizes of the victim Ma Jun and the murderer are similar. There should be only half a size difference, 42 and 42.5."
"The two are similar in height, but their weight and age are quite different, so from here you can distinguish some old cotton shoes.
The seal belongs to the victim Ma Jun, and some others may belong to the murderer."
Bai Jian quickly said at this time: "A lot of these old cotton shoes were sold back then. There were many people in Majiazhuang wearing the same soles. How can you tell them apart?"
Jiang Yuan said easily: "Even if the shoes are from the same batch, the soles are the same, but the degree of wear is different. The soles after wear are naturally different."
Jiang Yuan placed three photos on the spot as examples: "These three photos are the crime scene. The footprints of three pairs of identical old cotton shoes. It can be seen that the right and left sides, as well as the heel position, have different wear points.
.”
Bai Jian opened his eyes wide, feeling like he saw something, but also feeling like he didn't see anything.
It was impossible for Jiang Yuan to tell Muggles "the impact of different tones on the power of magic." He waited for a moment and then continued: "The key is that the same shoe print can show two physical characteristics, which also means that this pair of shoes
Two people passed through..."
"The same pair of old cotton shoes have discordant footprints. Although they may be worn by family members, you can still tell them apart by comparing them with sports shoes."
"In short, I think it is feasible to find breakthroughs through on-site footprints."
Jiang Yuan quickly made a summary and looked at Captain Bai.
Bai Jian had no way to refute, and even felt that what Jiang Yuan said made sense.
At this time, Bai Jian's heart started beating wildly.
If Jiang Yuan's point of view is confirmed, there will really be new clues to this case.
For a long-standing murder case, any new clues are precious. What’s more, the clues in front of you sound very reliable.
The feeling of spectrum.
"The murderer should have some knowledge of Ma Jun's family. You can tell from the movement of blood stains that the murderer's route of action is very straightforward." Liu Jinghui suddenly said: "A fellow villager? Or a relative or friend?"
Jiang Yuandao: "You kill people very cleanly."
"Majiazhuang is a relatively remote village. A few years ago, there would have been relatively few outsiders. To understand the layout of Ma Jun's house, especially to find Ma Jun's house, only locals can do it.
Right. However, Ma Jun’s family is not too wealthy, so it turns out that his home is the first one to be burglarized?” Liu Jinghui thought as he spoke, with a lot of inspiration bursting out of his mind.
Huang Qiangmin silently took out his mobile phone and began to send messages to several leaders in charge of Shiting County.
