Attending ex-girlfriend's wedding, arresting the groom's officer on the spot

Chapter 331 Major Discovery
Lu Chuan frowned and started the third measurement.

"The location of the center of gravity...that's right."

"Immediate edge...[-]mm...typically small feet with big shoes...but...how is this possible?"

Although Lu Chuan's bloodstain pattern analysis skills are only intermediate, they are not as good as fingerprint identification and analysis.

However, intermediate skills are definitely at the level of provincial experts.

However, the analysis of shoe prints...

Lu Chuan's footprint identification and analysis is an elementary skill, and there is a big gap between it and bloodstain morphology analysis.

But no matter how big the gap is, it is unlikely that there will be subversive conclusions.

"Height... 1.7 meters five to 1.7 meters eight... Great strength, young..."

For such an adult, whether he is a man or a woman, his height and weight are here, and his physical fitness is here. Is it possible that the other person has a congenital foot deformity?

A person with a height of 1.7 meters and a size 36 foot?

It's possible, but not likely.

Theoretically speaking, the height of a person is proportional to the length of the foot, which is also the basis for the analysis of footprint identification.

Of course, it does not rule out some special circumstances, such as congenital deformities, which lead to an imbalance in the ratio of foot length to height.

This probability...

One in ten thousand, or one in hundreds of thousands?

If there is no such probability, why on earth does this happen?

What happened on the scene?
Is it...

More than one murderer?

its not right!
Judging from the traces of blood spray at the scene, and the distance from the door to the bed, it can be determined that the victim was violently attacked by one person.

Because the blood spray is blocked, the number of people present can be reflected.

This judgment does not require particularly powerful skills, as long as a criminal policeman who has seen several similar scenarios and cases can make a clear judgment.

Just now, several people from the serious crime team had no doubts about this.

This shows that there was only one person who committed violence at the scene.

But what about shoe prints?

Puzzled, Lu Chuan completed the third measurement.

Foot length, blur edge size, footprint center of gravity position, skeletal analysis on the impact of pressure on different positions of the footprint, gait simulation, step angle and step width data...

"Female, between 1.5 meters and 1.6 meters tall, weighing about 20 kilograms, aged between 25 and [-], with slightly bowed legs."

After three measurements, Lu Chuan finally came to the above conclusion based on the on-site footprints!
And this conclusion is completely opposite to the conclusion drawn from the bloodstain morphology analysis.

What's more, the victim had clearly been sexually assaulted, but the fingerprint analysis showed that he was a woman!
The temporary meeting room of the crime team.

Li Donglin sat at the first place, holding the bloodstain morphology analysis report and footprint identification analysis report issued by Lu Chuan.

Wang Song, Song Mingguang and others were also sitting there.

"Lu Chuan, are you sure that these two appraisal and analysis reports... are okay?"

Lu Chuan nodded affirmatively.

"I can be sure that everyone has the same opinion as me about the shape of the blood stains at the scene."

"There is only one murderer, who should be between 1.7 and 1.8 meters tall, young and middle-aged."

"The shape of the blood at the scene of the crime, the angle at which it was sprinkled, and the strength of it can all be used as the basis for this conclusion."

"Also, judging from the direction blocked by the blood spray, it was a person who did it at that time."

"It should be one person. If two people commit the crime, the blood spray at the scene will definitely change in different directions."

Illustration by Wang Song, Song Mingguang and others also nodded.

It is not difficult to see this.

For example, after the victim was injured, whether the sprayed blood was blocked by one block or two blocks, it was easy to make a judgment based on the fault of the blood.

"But what about the shoe prints?"

"Your footprint analysis... is a woman who is not less than 1.6 meters tall?"

As for the footprints at the scene, everyone believed that the murderer had wiped the blood, erased his own footprints when he committed the crime, and returned wearing the victim's shoes.

However, according to Lu Chuan's analysis and judgment, it means that there should be another person at the scene.

This person did not participate in the previous harm to the victim, but in the end, she walked into the crime scene wearing the victim's shoes.

Even the knife on the victim's neck was probably caused by the last person who appeared.

Strong and the last to kill, isn't it alone?

"Regarding the analysis of footprints, I can say responsibly that there may be errors in the conclusions, but subversive mistakes will never occur."

"Moreover, the height and weight deduced from the footprints also rule out the possibility of congenital deformities in the murderer's feet."

"I think it is necessary to expand the suspects and focus on screening couples and couples who live in the apartment building and meet the conclusions of the bloodstain morphology and footprint identification analysis!"

Everyone, including Li Donglin, frowned.

According to the report of the QZ City Criminal Investigation Detachment, they focused on the investigation of single men in the apartment building in the early stage.

Now it seems……

The reason why the murderer was not found was very likely that they were the object of suspicion, and there was a major deviation.

Both committing crimes with two people and committing crimes by one person are both wrong. It would be strange if the case could be solved.

But, then again, is Lu Chuan's technical analysis reliable?

Li Donglin's choice gave the answer.

"According to Lu Chuan's identification and analysis results, reorganize the suspect's target range."

"Especially the height of women, 1.5 meters to 1.6 meters and weight of about [-] kilograms. Such a thin woman should not be difficult to find. Let's split up!"

……

Except for Lu Chuan, the members of the serious crime team who came this time are all top experts in front-line investigation and solving crimes.

With the general characteristics of the target, there will soon be a target suspect.

"Room [-]!"

The couple living on the same floor as the victim Wang Min, in room [-], fully conformed to the conclusion drawn by Lu Chuan.

In the past week, there were more than 300 people living in the apartment building, and the QZ City Criminal Investigation Detachment had already completed basic information collection.

Among the more than 300 people, there were more than 100 women and more than 200 men. There were only 4 women who met Lu Chuan's analysis of footprint identification.

A single woman lived in room [-], a single mother lived in room [-], the elder sister of two sisters lived in room [-], and a couple lived in room [-].

"The woman's name is Sun Lulu, an online novel writer, and the man's name is Zhang Cheng. She and Sun Lulu are high school classmates. The physical characteristics of these two people are in line with Lu Chuan's identification conclusion."

There are six people in the serious crime team, one of whom is responsible for the three floors. After summarizing the information, Wang Song began to report.

"Four people, I suggest interrogating all of them."

"The point is seven zero three!"

"Agreed, recommending a raid on the room in which four persons live."

Now that important progress has been made, and there is Lu Chuan's appraisal conclusion as the basis, the arrest interrogation and surprise inspection naturally do not have any violations.

"action!"

(End of this chapter)