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

"A man and a woman?"

Old Bai, holding the analysis report, carefully went through it: "Lu, are you sure there's no mistake?"

Lu Chuan shook his head, initially unsure about the identification analysis results himself.

In murder cases, historically, the probability of female perpetrators is relatively low.

Lu Chuan encountered probability analysis data on this aspect during his university days.

Men naturally have advantages in physical strength and courage compared to women.

Killing is often not just a technical task; it requires physical effort, especially when concealing or moving a body is involved.

However, in some premeditated murder cases, the proportion of female perpetrators is relatively higher compared to the general probability for murder case perpetrators.

This is because, for the same reasons, women typically have less physical strength and their methods tend to favor poisoning or other technical means.

But a man and a woman committing murder together...

This is indeed rare in cases that are not crimes of passion.

"This set of footprints," Lu Chuan picked up a photo of one set of footprints: "On the surface, these footprints look like those left by size 41 men's sneakers."

"However, the footprints show uneven pressure distribution inner and outer, front and back, with different footprints having shifts in the center of gravity."

"I analyzed the pressure size, pressure points at the heel and palm, and combined with the depth of the tread patterns, I calculated that the person wearing these shoes weighs less than 50 kilograms and is about 165 centimeters tall."

"And here," Lu Chuan placed the shoe print photos on the backlight board and then took out another footprint photo: "This is a photo of the right foot from two sets of unfamiliar shoe prints."

"Both pairs of shoes are size 41 sneakers, just with different tread patterns."

"However, despite the difference in tread wear, the wear points—although the heel, sole, outer edge, and inner edge wear vary—are basically the same."

"What does this indicate?"

Liu Guodong and the others, although not very experienced in footprint analysis, are seasoned in crime scenes.

They can still distinguish general situations: "Different wear extent but the same wear position indicates the same person wearing different shoes?"

Old Bai provided the analysis Lu Chuan wanted to hear.

Yang Sen nodded and continued: "It's just that due to different purchase times, this situation appeared?"

"A person cannot simultaneously wear two pairs of shoes at the same scene."

Liu Guodong removed the footprint photo Lu Chuan had first placed on the backboard: "There are two people on the scene, one of whom, a woman, wore a man's shoes?"

"Yes, that should be the case."

Both sets of shoe prints were quite clear, and although Lu Chuan had only elementary footprint identification and analysis skills, generally speaking, such clear shoe prints could be analyzed in about an hour.

This time, spending the better part of a night was mainly due to handling this special footprint.

"But why?"

Old Bai shook his head: "Why would this woman wear someone else's shoes?"

"They didn't clean the shoe prints they left behind, indicating a lack of counter-investigative awareness."

"Since they didn't have that, why would the woman wear a man's shoes?"

Old Bai's question indeed posed a conundrum.

Yet, Liu Guodong shook his head: "What's so strange about that?"

"It rained last week. I picked up my wife and there was a puddle in front of the unit. My wife took off her high heels and wore the spare police boots from my car trunk."

"If they were dealing with muddy rural areas and she wore high heels, temporarily switching to a partner's sneakers would make sense."

"Let's do this," Liu Guodong finally decided: "We will first send the report to Captain Qin and let them know our speculation."

"Then the rest is up to Ren Qiang and his team."

"The critical thing is..." Liu Guodong looked at Lu Chuan: "How accurate is this identification analysis?"

Lu Chuan paused, understanding Liu Guodong's intent.

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

Deduction and solving cases are not their tasks, nor their specialty.

Their core duty is to produce reliable, accurate analytical reports.

To provide technical support for the front-end investigative analysis.

"For male footprint analysis, there is over a 90% certainty."

"For the female report, an accuracy of... 70%! At least a 70% certainty is assured."

Ninety percent, seventy percent!

"That is already a very high rate of accuracy."

Liu Guodong, after many years in crime scene investigation, knew that nothing can be 100% accurate.

Especially in physical evidence analysis, no one dares to claim their work as absolutely correct.

They can only do their best to produce a relatively accurate result.

Therefore, generally, criminal investigators prefer not to engage with cases lacking confessions.

Not that there is an issue with this method but psychologically, without confessions, it feels incomplete.

Like how singing in a KTV is enjoyable and relaxing, yet not ascending feels like something is unsettled.

Scratching an itch through a shoe is precisely this feeling.

Life should be complete, not just the prelude to living but also an outlet for dissatisfaction.

Like unclogging a faucet where dirt spurts out, so that everything is better.

The saying goes: Where there is free flow, there is no pain.

Conference Room No. 1.

Qin Yong had been commanding all night.

"Tell Yuan Shaokang that from the time Song Kun joined the police and caught his first criminal, I want all suspect information related to Song Kun."

"Where were they when the incident occurred today, and do they have alibis? Let the High-tech Zone Criminal Investigation Team inspect each person, missing none."

"What was the missing person case Song Kun was working on before he got into trouble?"

"How long ago was it that he delivered apples to the orphanage, and who knew about it?"

"Operating on Longjiang Road is surely no coincidence. They must have known Song Kun's habits."

"Don't give me explanations; inform the traffic police that all vehicles within a ten-kilometer radius must be checked!"

"No one? If there aren't enough people, I'll borrow some. Director Song has already stated that if needed, the city's police personnel, even the archivists, should step in!"

Qin Yong's hair had already become a nest from the stress.

A detective nearing retirement was murdered in a staged traffic accident; surely something is being hidden behind the scenes.

Cops can die; dying in the line of duty is not uncommon.

This kind of thing happens every year.

But being murdered in a staged traffic accident, what does this mean?

It is a challenge and an affront to the police!

The case was reported to the provincial office; the leadership is highly concerned.

The top official of the provincial office personally called Director Jiang Guo Song.

The requirement is singular: the case must be solved.

They need to provide an answer to all police officers.

But after more than ten hours since Song Kun's murder, the case progress is very limited.

Except for the burned-down perpetrator's vehicle, there are no other leads.

Qin Yong even felt as though a sharp sword was hanging over his head, poised to fall at any moment.

If the case remains unsolved...

It may soon spell the end of Qin Yong's role as team captain.

Song Jiang might not dismiss him, but he would have no face to continue.

Bam!

The conference room doors swung open, drawing everyone's attention.

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

"Old Liu, any good news?"

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