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

Chapter 103 Hidden Criminal Organization
There is no distinction between good and bad among the four methods of field survey photography. Each method has its own applicable scenarios and its own advantages.

For example, the central photography method used by Lu Chuan this time is to record the characteristics of the central object on the scene, as well as the relationship with adjacent objects and traces.

It is characterized by the enlarged ratio and sensitivity of the evidence, which can completely restore the situation at the scene.

When comparing tire marks, the size of the marks and the color of the marks are all important factors for comparison, so it is most appropriate to take a central photography method.

As for detailed photography, it is the details that stand out.

In the on-site survey and photographing procedures, only the detailed photography method can take pictures of individual traces and objects out of the surrounding environment, reflecting the shape, size and details of the traces and objects on the spot.

The requirements for detailed photography are relatively fine, and it is necessary to ensure that the photographed traces and physical evidence are kept parallel to the lens and photosensitive film, and that the photographed objects and traces are not deformed.

At the same time, when using detail photography, it is also necessary to follow the principle of proportional photography to accurately reflect the size, thickness and length of the photographed traces and physical evidence.

For example, the degree of wear of the tire pattern, the details of specific damage, and these tiny traces are easier to compare and analyze using detailed photography.

Lu Chuan has elementary survey photography skills in his hands, and these tasks are carried out smoothly, and it is no problem to complete an ordinary center photography and detailed photography.

The focus is on the modeling of the tire tracks afterwards.

In tire track analysis, comparison and identity not only require photos, but also a fixed model.

Of course, time is tight and tasks are heavy, so it is too late and unnecessary to shape the model.

These tasks are only used when tire marks are needed as evidence after the case is solved.

As for the production of the model, there are relevant skills in the intermediate tire track identification analysis.

This is a bit like a dentist's job, because dental plaster is used.

Dental plaster is different from ordinary plaster in that it hardens more quickly after being poured into an object.

General dental gypsum is made of β-model gypsum powder, while dental anhydrite is generally prepared with α-gypsum powder.

There is also a kind of dental superhydrite, which uses special α gypsum produced by liquid phase method as raw material.

The three kinds of dental plasters are things that are occasionally used in forensic medicine and trace inspection. Different types of plasters are selected according to different usage scenarios.

Lu Chuan had no similar experience in surveying a car before.

Fortunately, Wang Hao and the others are also here. These people are veterans of current surveys, so it is no problem to do this kind of surveys.

As for the DNA samples extracted from the basement yesterday, the comparison has been processed.

The comparison results are not gratifying, or not very gratifying.

A total of six people's DNA information was found, and only one person was found, which was the missing Goldman Sachs.

Now, it is basically certain that Goldman Sachs has been killed.

There was no blood in the BMW, the car was clean.

But some hair and dander were still found in the trunk.

The DNA tester is about to get busy again.

In one morning, the preliminary work of the current survey was basically completed, and the corresponding DNA samples were also being processed.

There should be results in the afternoon.

And the front line, where Li Donglin focused most of his energy, finally received good news.

Wang Liang, the boss behind 29 Biological Co., Ltd., has finally been found.

Not in BZ City, people hiding in the provincial capital, directly attack there.

Lu Chuan used fingerprint analysis to identify the three people, and two of them were also found.

These two people are both in the No.1 civilian hospital in BZ City.

One of them was a patient who had just finished a kidney transplant.

The other person is his primary physician.

The patient has been brought under control in the hospital, and the doctor has been detained.

In Li Donglin's words, if a doctor's fingerprints appeared on the operating table in the basement of Chen Gang's villa, we should know what role he played.

This time, there is a breakthrough.

In the hospital, the patient who received the kidney transplant said everything.

"500 million, they said that my match is not available now, if I want to have surgery as soon as possible, I have to pay for it!"

"Where was the surgery performed?"

"I don't know. I was given anesthesia at the time, so I didn't know anything."

In the interrogation room, the face of the doctor who operated the knife was as pale as paper: "I... I am only in charge of the surgery... other... I... I really didn't participate, really!"

The interrogation work is in full swing, and the arrest work is non-stop.

This is a secret criminal organization, currently involving a total of eight people.

Doctors from Binzhou No. [-] Hospital were in charge of receiving patients, and then handed over the matching requirements to Chen Gang.

Chen Gang directed Wang Manli to compare the blood information of all medical examiners at the Qingsong Medical Examination Center.

After finding the receptors that meet the matching needs, they will deceive the other party through sex and other methods, and Chen Gang is responsible for making the other party disappear.

Wang Liang is in charge of establishing a shell company, cheating the hospital's supervision, and using donations and other methods to meet the needs of patients.

There are four other people, all from Binzhou No.1 People's Hospital.

Including a security guard, two nurses and an ambulance driver.

Together, the four can get a person out of the underground garage of the hospital without anyone noticing.

Early the next morning, all known suspects were arrested and brought to justice.

Lu Chuan did not have any fingerprints in the system for comparison, and the fingerprints collected on the nurses and ambulance drivers were successfully compared.

"Ding!"

"Advanced task completed: the host successfully participated in the special case team of the provincial department, extracted fingerprint information on the operating table, which became the key clue to arrest the suspect, completed the on-site investigation of the vehicle involved in the case, fixed the criminal evidence of the suspect, and successfully provided technology for the case to be solved support."

"Task reward: an intermediate skill card, please choose the reward type by the host."

wow...

In his mind, the system reward interface opened again, and numerous skill options appeared in Lu Chuan's consciousness.

"Intermediate field survey skills!"

This time, without any hesitation, Lu Chuan directly chose an intermediate skill under criminal investigation technology.

Survey now!

As an investigation criminal policeman, what Lu Chuan mastered the most was the ability to detect traces.

Intermediate Footprint Identification Analysis, Advanced Fingerprint Identification Analysis, Intermediate Skeleton Analysis, and Intermediate Tire Track Analysis.

But for the current survey direction, Lu Chuan only has a primary survey and photography skill and an intermediate fingerprint collection skill in his hand.

This time, when he was working on the basement of Chen Gang's villa and on the spot survey of the BMW, Lu Chuan clearly discovered his own shortcomings.

It's no problem when it comes to spotting and taking pictures. Although the junior spotting and taking pictures are not very brilliant, they are comparable to the spotting criminal police of the general criminal investigation detachment.

When it comes to fingerprint collection, Lu Chuan is not afraid.

With intermediate fingerprint collection skills, Lu Chuan's ability in this area surpassed his colleagues by a large margin.

Wang Hao did not collect the fingerprints on the operating table.

But for other things, such as buckling things in the cracks of the floor tiles, Lu Chuansheng is careful and has not yet reached the age to treat work as work.

But in terms of technique and professionalism, there is a gap with Wang Hao.

In the field survey of the BMW, except for the extraction of tire marks, Lu Chuan showed a very high professional quality. At other times, he was basically stealing.

Now, with the intermediate survey skills in hand, Lu Chuan heaved a sigh of satisfaction.

(End of this chapter)