The results of the comparative analysis of the two sets of footprints surprised Liu Guodong and the others.

"A man and a woman?"

Lao Bai took the analysis report and read it carefully: "Xiao Lu, you are not mistaken, right?" ”

Lu Chuan shook his head, he was a little unsure about the results of the identification and analysis at first.

In homicides, in terms of the gender probability of the murderer found historically, the proportion of women is relatively low.

When Lu Chuan was in college, he was exposed to probability analysis data in this area.

Men are born with an advantage over women in physical strength and courage.

Murder is not only technical work, but also physical work, especially many homicides also involve hiding and removing corpses.

However, in some planned premeditated homicide cases, the proportion of women is higher than the overall homicide murderer.

This is also the reason mentioned above, women's physical strength is average, compared with men, women's means of killing are more inclined to poison or other technical methods of killing.

However, a man and a woman killed......

In cases of non-emotional killings, it is indeed uncommon.

"This set of footprints," Lu Chuan picked up a photo of one of the footprints: "This set of footprints, on the surface, is the traces left by men's shoes size 41 sports shoes." ”

"However, the force on the inside and outside, front and back of the footprints is uneven, and the center of gravity of different groups of footprints has shifted back and forth."

"I carefully analyzed the force size and stress points of the heels and palms of these groups of footprints, combined with the depth of the shoe prints, and calculated that the person wearing these shoes weighs less than 50 kilograms and is about 1.65 meters tall."

"And here," Lu Chuan inserted the photo of the shoe print into the backlight panel, and took out another photo of the shoe print: "These are two sets of photos of the right foot of the unfamiliar shoe print." ”

"Both shoes are No. 41 sneakers, but the texture is different."

"But their edges are worn out, heels ...... Sole...... Although the degree of wear on the outer and inner edges is different, the wear parts are basically the same. ”

"What does that mean?"

Liu Guodong and the three of them are also old surveyors, although they are not so experienced in footprint analysis.

But the general situation can still be distinguished: "The degree of wear is different, the wear part is the same, which are different shoes worn by the same person?" ”

Lao Bai gave the analysis that Lu Chuan wanted to hear.

Yang Sen nodded and continued: "It's just because the time of purchase is different, so this situation occurs?" ”

"It's impossible for a person to be on the same scene wearing two pairs of shoes at the same time."

Liu Guodong took off the photo of Lu Chuan's shoe print that Lu Chuan first put on the back panel: "There were two people at the scene, and one of the women wore men's shoes? ”

"Yes, it should be."

Both sets of shoe prints are relatively clear, although Lu Chuan has mastered the ability of primary footprint identification and analysis, but this level of clarity of shoe prints, generally speaking, can be analyzed in an hour.

This time, the reason why it took a little midnight was mainly to deal with this shoe print.

"But why?"

Lao Bai shook his head: "Why does this woman wear each other's shoes?" ”

"They did not clean up the shoe prints left behind, which shows that the other side does not have the awareness of anti-reconnaissance in this regard."

"Since there isn't, then why does this woman wear men's shoes?"

Lao Bai's problem is indeed a problem.

But Liu Guodong shook his head: "What's strange about this. ”

"When it rained last week, I went to pick up my daughter-in-law, and there was a section of waterway at the door of the unit, and my daughter-in-law picked up her high heels and wore spare police boots in the trunk of my car."

"It's rustic in the ravine, and if the other party wears high heels and temporarily changes into his accomplice's sneakers, it's reasonable."

"In this way," Liu Guodong finally made a decision: "Let's send the report to the Qin team first, and tell them our guess." ”

"The rest, I'll leave it to Ren Qiang."

"The key is ......" Liu Guodong looked at Lu Chuan: "The accuracy of this identification analysis ...... How big is it? ”

Lu Chuan paused, he knew what Liu Guodong meant.

The Investigation Office is responsible for the identification and analysis of physical evidence.

Reasoning and solving cases are not their business, and they are not good at these.

The key task of the field survey office is to produce a strong and accurate analysis report.

Provide technical support for front-end reconnaissance and analysis.

"The results of the identification of men's footprints are more than 90% certain."

"Reporting accuracy for women...... Seventy percent! At least 70% sure that it is no problem. ”

Ninety, seventy!

"That's a very high accuracy rate."

Liu Guodong has done so many years of field surveys and trace inspections for so many years, and knows that nothing is 100% accurate.

Especially in the analysis of physical evidence, no one dares to say that what they are doing is absolutely correct.

They can only do their best to come up with a relatively accurate identification result.

Therefore, generally speaking, most criminal police officers are reluctant to touch zero confession cases.

It's not that there is a problem with this method of handling the case, but based on psychological influence, there is no confession, and I always feel a little uninteresting.

Just like relaxing in KTV, just singing is also fun, pleasant and emotional.

But if you don't go upstairs, you always feel like something hasn't been done.

That's what Scratching Boots means.

Life is to be fulfilling, not only the foreplay of life, but also the venting of dissatisfaction.

It's like a clogged faucet, just squirt dirt out.

The famous saying is good: the general rule is not painful.

Conference Room 1.

Qin Yong has been in command for a night.

"Tell Yuan Shaokang, starting from the first prisoner Song Kun arrested by the police, I want all the suspect information related to Song Kun."

"When the crime happened today, where were they, and whether there was an alibi, let the people from the Criminal Police Brigade of the High-tech Zone go to investigate one by one, and none of them can be missed."

"What happened to the disappearance case that Song Kun followed before the accident?"

"And he went to the orphanage to deliver apples, how long has this been, who knows?"

"The other party made a move on Longjiang Road, it must be no coincidence, it must have figured out Song Kun's habits."

"Don't give me a reason, tell the traffic police that all vehicles within a radius of ten miles must be investigated!"

"No one? I borrowed it if there was no one, the Song Bureau spoke, and if the city's police force was in need, the archivists gave it to me! ”

Qin Yong's hair had been blown into a chicken nest.

A criminal police officer who is about to retire is killed in a fake car accident, there must be something hidden behind it.

The policeman can die, because he died on a mission, nothing.

This happens every year.

But killed in a fake car accident, what is it?

This is a provocation to the police!

The case has been reported to the provincial department, and the leadership attaches great importance to it.

The top leader of the provincial department personally called Director Song Jiangguo.

There is only one request, and the case must be solved.

They want to give an account to all the police.

However, more than ten hours have passed since Song Kun was killed, and the progress of the case is very limited.

Except for the burned vehicle, there are no other clues.

Qin Yong even felt that there was a sharp sword hanging above his head at all times.

And it will fall at any time.

This case can't be solved......

Qin Yong, the captain, is almost at the end.

Song Jiangguo did not remove him from his post, and he himself had no face to do it.

Touch!

The door to the conference room opened, attracting everyone's attention.

Seeing that it was Liu Guodong, Qin Yong's eyes lit up.

"Lao Liu, is there any good news?"