Chapter 79 Jiwotou Qin Yong
The results of the comparative analysis of the two sets of footprints surprised Liu Guodong and the others.
“One man and one woman?”
Lao Bai took the analysis report and read it carefully: “Xiao Lu, are you right?”
Lu Chuan shook his head, He was also a little unsure about the identification and analysis results at first.
In murder cases, judging from the historically found gender probability of the murderer, the proportion of women is relatively low.
When Lu Chuan was in college, he was exposed to this aspect of probability analysis data.
Men are born with advantages over women in terms of physical strength and courage.
Killing is often not only a technical job, but also a physical job. In particular, many murder cases involve hiding and moving corpses.
However, in some premeditated murder cases, the proportion of women is higher than the gender probability of the murderer as a whole.
This is also the reason mentioned above. Women's physical strength is average. Compared with men, women's methods of killing are more inclined to poison or other technical killing methods.
However, a man and a woman kill...
It is indeed uncommon in cases of non-committal murder.
“This set of footprints,” Lu Chuan picked up one of the photos of the footprints: “This set of footprints, on the surface, appear to be traces left by men’s size 41 sneakers.”
< br>“However, the internal and external, front and rear forces of the footprints are uneven, and the center of gravity of different sets of footprints shifts forward and backward.”
"I carefully analyzed the stress magnitude and stress points on the heels and palms of these sets of footprints, combined with the depth of the shoe prints, and calculated that the person wearing this pair of shoes weighs less than 50 kilograms and is 1.65 meters tall. Left and right."
"And here," Lu Chuan inserted the shoe print photo into the backlight and took out another shoe print photo: "This is a photo of the right foot of two unfamiliar shoe prints."< br>
“Both pairs of shoes are size 41 sneakers, but the textures are different.”
“But their edge wear, the heel...the sole of the foot...the outer edge and the inner edge Although the degree of wear is different, the worn parts are basically the same."
"What does this mean?"
Liu Guodong and the other three are also experienced surveyors, although they are not that experienced in footprint analysis.
But in general, it can still be distinguished: "The degree of wear is different, but the wear parts are the same. Are these different shoes worn by the same person?"
Lao Bai gave what Lu Chuan wanted to hear. to the analysis.
Yang Sen nodded and continued: "It's just because the purchase time is different, that's why this situation occurs?"
"It is impossible for a person to wear two pairs of shoes at the same time and appear in the same place. Live.”
Liu Guodong took off the photo of shoe prints that Lu Chuan first put on the backboard: "There were two people at the scene. One of the women was wearing a man's shoes?"
"Yes, that should be the case."
< br>Both sets of shoe prints are relatively clear. Although Lu Chuan has mastered the ability of primary footprint identification and analysis, shoe prints with this level of clarity can generally be analyzed in an hour.
This time, the reason why I spent half of the night was mainly focusing on dealing with the shoe print.
“But why?”
Lao Bai shook his head: "Why did this woman wear the other party's shoes?"
"They did not clean up the shoe prints left, which shows that the other party has no counter-reconnaissance awareness in this regard."
>"If not, then why does this woman wear men's shoes?"
Lao Bai's question is indeed a problem.
But Liu Guodong shook his head: "There is nothing strange about this."
"It rained last week and I went to pick up my wife. There was a waterway in front of the unit. My wife took off her high heels and wore the spare police boots from the trunk of my car."
"It's rustic in the ravine. Big, if the other party is wearing high heels, it would be reasonable to temporarily put on his accomplice's sneakers."
"In this way," Liu Guodong finally made the decision: "Let's send the report to Team Qin first. Tell them the guess."
"Leave the rest to Ren Qiang and the others."
"The key is..." Liu Guodong looked at Lu Chuan: "The accuracy of this identification analysis... …how big?”
Lu Chuan paused. He knew what Liu Guodong meant.
The current investigation office is responsible for the identification and analysis of physical evidence.
Reasoning and solving crimes are not their thing, and they are not good at it.
The key task of the current survey office is to produce powerful and accurate analysis reports.
Provide technical support for front-end investigation and analysis. "The identification results of male footprints are more than 90% certain."
"The accuracy of women's reports... 70%! At least 70% sure."
Ninety percent, seventy percent!
“This accuracy rate is already very high.”
Liu Guodong has been doing spot surveys and trace inspections for so many years, and he knows that nothing is 100% accurate.
Especially when it comes to physical evidence analysis, no one dares to say that what they are doing is absolutely correct.
They can only try their best to come up with a relatively accurate identification result.
So, generally speaking, most criminal police officers are unwilling to touch cases with zero confession.
It’s not that there is anything wrong with this method of handling the case, but because of the psychological impact, without a confession, it always feels like it lacks some meaning.
Just like relaxing in a KTV, just singing is fun, pleasing the body and mind, and cultivating one's sentiments.
But if I don’t go upstairs, I always feel like something is not done.
That’s what I mean by scratching my head.
Life is about perfection, not only the foreplay of life, but also the venting of dissatisfaction.
Just like a clogged faucet, just spray out the dirty stuff.
As the famous saying goes: the general rule is that it doesn’t hurt.
Conference room one.
Qin Yong has been taking command all night.
"Tell Yuan Shaokang that starting from the first prisoner Song Kun arrested, I want all the suspect information related to Song Kun."
"When the crime happened today, Where are they? Do they have an alibi? Let the people from the High-tech Zone Criminal Police Brigade investigate one by one. No one can be missed. "
"What happened to Song Kun's disappearance before the accident? "
"And he went to the orphanage to deliver apples. How long has this been going on? Does anyone know?"
"The other party doing it on Longjiang Road is definitely not a coincidence. He must have figured out Song Kun's habits. "
"Don't give me any excuses. Tell the traffic police that all vehicles within ten miles must be checked!"
"No one? I'll borrow it. Bureau Song has spoken. If there is a need in the city’s police force, I will support the archivists!”
Qin Yong’s hair has exploded into a chicken nest.
A detective who was about to retire was killed in a faked car accident. There must be something hidden behind it.
The police can die because they died on duty, it’s nothing.
This happens every year.
But being killed in a fake car accident, what is this?
This is a provocation to the police!
The case has been reported to the provincial department, and the leaders take it very seriously.
The head of the provincial department personally called Director Song Jiangguo.
There is only one requirement, the case must be solved.
They want to give an explanation to all the police.
However, more than ten hours have passed since Song Kun was killed, and the progress of the case has been very limited.
Apart from the burned vehicle, there were no other clues.
Qin Yong even felt like there was a sharp sword hanging above his head at all times.
And it will fall at any time.
This case cannot be solved...
Qin Yong, the captain, is almost done.
If Song Jiangguo didn't remove him from his post, he himself would have no shame in continuing to work.
Bump!
The door of the conference room opened, attracting everyone's attention.
Qin Yong's eyes lit up when he saw it was Liu Guodong.
"Old Liu, is there any good news?"
(End of this chapter)