Tianzhou is the second largest city in the province, only slightly worse than the provincial capital.

But it is much stronger than Haizhou's economic development, and its population is also larger.

Wang Changjiang is no stranger to the Tianzhou City Criminal Investigation Detachment.

In the past 20 years, the Haizhou Criminal Investigation Detachment has repeatedly requested technical support from the Tianzhou Criminal Investigation Detachment.

Wang Changjiang and Li Kai, the forensic doctor here, are classmates again, and they have also exchanged and studied professionally.

However, in the past, when Wang Changjiang came to Tianzhou City, he did not say that he was low, but he must have a low profile when asking people to do things.

Like now, Li Kai was by his side, his smile was extremely unnatural, and Wang Changjiang's head was about to rise to the sky.

"Lao Li, I remember that the equipment in your forensic laboratory is more than ours, and it is all imported."

Wang Changjiang's mouth snorted: "We came to visit last time, and we wanted to buy it, but unfortunately we couldn't afford it." ”

Li Kai looked at his old classmate speechlessly: "I asked you to come to the Tianzhou Criminal Investigation Detachment back then, but you gave up by yourself." ”

Wang Changjiang glared at Li Kai angrily: "Yuelan's family is in Haizhou, can I come to Tianzhou?" ”

Lu Chuan just followed, and didn't talk much along the way.

He could see that Li Kai and Wang Changjiang had a good relationship.

"You're carried away by love."

Cut!

Wang Changjiang gestured a middle finger: "Come, let's introduce you to our Haizhou Criminal Investigation Detachment's current criminal policeman, Lu Chuan." ”

"This is our technical master, an expert in the identification of bones."

Of course, Li Kai knew Lu Chuan, and it was Lu Chuan who was recommended by Zhang Yuanchao to help them do the identification and analysis of the bones.

However, he didn't expect Lu Chuan to be so young.

It looks like a recent college graduate.

"Officer Lu is really young and promising, and he can be praised by Zhang Lao, the first forensic doctor in the provincial department, and you are the first in our province."

Lu Chuan's smile was very gentle: "Forensic Doctor Li, you are polite, you can call me Xiao Lu." ”

"I just have a little research on the identification of bones, and Zhang Yuanchao forensic medicine praised it."

Li Kai waved his hand: "Forensic doctor Zhang Yuanchao once worked in the criminal investigation detachment of Tianzhou City, and he can get his approval, and he also recommends helping us to do the identification and analysis of the bones, Officer Lu doesn't have a little research." ”

Li Kai got the bone identification and analysis report made by Lu Chuan through Li Changgeng of the Technical Appraisal Center of the Provincial Department.

To be honest, he didn't believe that this was an appraisal made by someone other than Zhang Yuanchao at that time.

What's more, the other party is not even a forensic doctor.

"Lao Li, don't be polite, let's talk about the case first."

Wang Changjiang's expression was serious: "We are here with orders this time, and we must do our best to assist you." ”

"For so many years, it has been the Tianzhou City Criminal Investigation Detachment that has given us support, and this time it can be regarded as our little personal favor."

The world's criminal investigation is a family, not to mention technical exchanges, cross-regional arrests are a common thing.

A squatting point for several days and nights in the car, which detachment of the criminal police have done.

Therefore, as long as you are busy with this kind of thing, you can't say no.

Speaking of the case, Li Kai's expression also became serious: "The bones were discovered yesterday afternoon, and an excavator dug up a highway was reconstructed and expanded. ”

"The skeleton is in the dissection room, and we have completed the skeleton restoration, but no obvious problems have been found."

Li Kai introduced and took Lu Chuan and Wang Changjiang to the dissection room.

On the steel dissecting table, a skeleton lies flat.

Lu Chuan put on three layers of gloves and carefully observed the situation of the skeleton.

"Crushed?"

Although the skeleton has been restored, the two ends of the sternum have broken and collapsed, and the entire ribcage can no longer support it.

Li Kai nodded: "We have conducted a carbon decay analysis on the bones, and determined that the time of burial should be at least fifteen years ago, which is exactly the time when the highway was built. ”

"We suspect that the deceased should have been buried first, and then run over by the roller in the process of compacting the road."

Lu Chuan looked around the corpse carefully: "Has the identity been confirmed?" ”

Li Kai shook his head: "We extracted the DNA information in the bone and compared it with the missing person database, but it was unsuccessful. ”

"So, we wanted to identify some of the physical characteristics of the owner of the bones through the identification and analysis of the bones, and see if we could confirm the identity."

After a brief investigation, Lu Chuan visited the forensic laboratory of the Tianzhou City Criminal Investigation Detachment.

Seriously, Lu Chuan was shocked.

As Wang Changjiang said, the Tianzhou City Criminal Investigation Detachment ...... Rich!

Take a look at the equipment in this room, the optical spectrum analyzer, the automatic bone density detector, the bone age carbon attenuation analyzer, and the variable frequency laser scanner......

With these things, Lu Chuan's time for bone identification and analysis can be cut in half.

Li Kai proudly introduced the functions and prices of various instruments.

There was a mixture of pride and shame in his expression: "There are a lot of things, and we will all use them, but the ability to do comprehensive analysis is not good." ”

"In this kind of case, you can only ask for support from above."

After learning about the equipment, Lu Chuan began to continue the detailed analysis of the bones.

The first is the skeletal cleanup.

Because they were buried, the bones were stained with some dirt.

Before doing the identification of the bones, Lu Chuan had to clean up all the bones.

At the same time, the cleaned soil should also be tested for soil quality.

A small brush was taken out of the current survey box, and Lu Chuan carefully cleaned up the bones.

Of course, this small brush is not LV's brand brush.

It is a brush made of pig hair, and the hair is hard, which is suitable for cleaning dirt.

Although this work was very tedious, Lu Chuan did not ask anyone to help.

Any detail must be observed by Lu Chuan.

"Symphysis pubis...... Angle...... If the skull is less than 70 degrees, the sex of the skeleton is judged to be male. ”

The male sacrum is long and narrow, and the angle of the pubic symphysis is between sixty and seventy degrees.

The female sacrum is short and wide, and the angle of the pubic symphysis is between 90 degrees and 100 degrees.

Of course, Li Kai and they have already done these basic judgments.

"Bone age carbon detection analysis, determined that the bone age is 56 years."

"According to the observation and analysis of bone rings, the age of the deceased at the time of death was ...... Forty years old. ”

Judging by age, Lu Chuan also synthesized some other situations.

For example, hip osteophytes.

After the age of 30, adult bones generally have growths, and there are more growths in the hip bones.

He was forty years old at the time of death, and the skeleton existed for fifty-six years, which means that the deceased died sixteen years ago.

"There are fossil-like inclusions on the feet and ankles, and the deceased had gout ...... before his death"

Bone Length...... 1.76 meters, height before death plus skin and flesh thickness...... At one meter seven eight. ”

The height of human bones is shorter than the height before life, and in addition to the thickness of the flesh and mortar of the feet and scalp, the fascia in the joints also has thickness.

And when the bones are ossified, these things will disappear.

"Bone density combined with height analysis: the deceased weighed 80 kilograms, and the bone density was two percentage points lower than the average, combined with age analysis...... The deceased lived in excellent conditions...... Chronic lack of exercise. ”

"The average level of coccyx tip smoothing is worse than the average person...... The deceased was sedentary for a long time before his death......"

In this skeleton identification and analysis, Lu Chuan completely demonstrated the strength of the intermediate skeleton identification and analysis skills.

Because of the high integrity of the bones, the information of the deceased before his death is far more comprehensive than the identification and analysis of the bones of the hot pot restaurant made by Lu Chuan.

"As for the cause of death......

Lu Chuan picked up the two sternums and carefully compared them.