When the doctor from Aikang Dental Clinic saw the police coming, he quickly put down what he was doing and greeted the two of them.
There were not many customers in the clinic. Jiang Hao looked around and saw that only one or two people were cleaning their teeth. There was a female doctor operating an ultrasonic scalpel to clean the dental calculus of the customers.
"That's right, we want to know from you, does your clinic provide this kind of dental braces?" Jiang Hao handed the dental braces in his hand to the doctor.
"Let me take a look, these dental braces look the same. In fact, there are some slight differences in the type of metal brackets. Moreover, the differences are also diverse depending on different purchase channels and brands...
.”
The dentist explained some popular science knowledge about braces to Jiang Hao in detail, but the key questions were never answered to the point.
"Do you have something like this in your store?" Jiang Hao asked bluntly.
"No."
Gan, Jiang Hao thought he had it, Balabala said a lot, and Jiang Hao listened patiently, but in the end he simply said nothing, and Jiang Hao didn't know what to say for a while.
"Excuse me."
After failing in the first battle, Jiang Hao had to keep up his efforts and go to the next one.
After all, there are still more than 200 that need to be investigated, so where are we now?
............
Forensic autopsy room.
Miao Xiaofeng walked past the door and saw Qin Lang dissecting a corpse.
So without disturbing him, he walked to the lounge nearby, sat down, and prepared to chat with him after he was done with his work.
Qin Lang was removing the deceased's pubic bone at this time. He saw Miao Xiaofeng out of the corner of his eye and stepped up to handle the work at hand.
He has specialized in forensic anthropology for many years, and this subject mainly conducts specialized research on human bones, and determines the age, height and gender of the deceased through some characteristics of human bones.
For corpses whose identity cannot be confirmed, the police only need to use this information to conduct investigations and interviews, which will eventually help the police clarify the true identity of the deceased.
Although Qin Lang didn't rest all night and had already made a simple autopsy report, he first inferred the age of the deceased based on the wear pattern of the teeth.
Judging age based on teeth is mainly based on two rules. One is to judge age based on the growth and development of teeth, which is suitable for minors.
The second type is judged based on the age-related changes in tooth development and maturity, which is mainly applicable to adults.
Teeth are divided into enamel and dentin. As we age, the cusps of the teeth will begin to grind flat and the dentin will gradually be exposed.
Because tooth wear changes are highly regular and easy to observe, this method has become the most commonly used age determination method in China.
Senior forensic doctors classified the degree of tooth wear into nine levels from shallow to deep based on the relationship between tooth wear and age.
The teeth of the deceased found in the pool this time were only slightly worn, and the essential points were not exposed.
Comparing the nine-level classification of tooth wear, it can be concluded that the deceased's teeth are worn between level one and level two. From this, it can be judged that his age is about 20-25 years old.
The age of the deceased can be determined by more than just the teeth.
The error in judging age through teeth is still relatively large. In a rigorous scientific attitude, in order to ensure the accuracy of the results, another method must now be adopted to further infer the age of the deceased. If these two methods
Only when the results are consistent can an accurate answer be obtained.
Qin Lang wanted to verify the accuracy of the age of the deceased obtained yesterday.
He plans to use other methods to accurately determine the age of the deceased. Inferring the age of the deceased through the bones is also a commonly used method in the forensic field, and this method is also divided into several different methods:
For example, bones such as the clavicle, ribs, sternum, and pubic symphysis can be used to infer their age.
Among these methods, the one preferred by Qin Lang is to infer age based on the pubic symphysis.
And this is also the purpose of his dissection.
The pubic bone is located at the front and lower part of the human hip bone. The pubic symphysis refers to the bony surface where the pubic bones on both sides join together relative to each other.
After the human body enters puberty, the shape of the pubic symphysis shows strong regular changes with age. Moreover, compared with other bones, the position of the pubic bone in the human body makes the morphological characteristics of the pubic symphysis rarely affected by
Changes due to external influences.
After Qin Lang took out the pubic bone, he handed it to his assistant to treat it with medicine.
He took off his gloves and washed them in the sink.
Then walked into the lounge next door.
"Old Qin, you've been busy all night, why don't you go back and rest?"
"Let's have a cigarette to refresh ourselves."
Miao Xiaofeng once went to the Hailing City Criminal Police Brigade for half a year. For people who are also from Mazhou, the two of them got along as if they had known each other for years.
He took out his cigarettes, handed one to Qin Lang and said, "You are about to retire, and you are still working so hard? Can your body bear it?"
Qin Lang lit the cigarette, took a puff, and slowly exhaled the smoke: "Seeing such a young life dying in front of my eyes, I still want to do something for her."
Just a moment ago, he was removing the pubic bone of the deceased, but now he lit a cigarette and put it in his mouth without any scruples. Who but an old forensic doctor could bear this?
"This is a bit unlike you. Tell me, you have been working as a forensic doctor all your life. What kind of scenes have you never seen? When did you feel sad?"
Forensic doctors, like doctors, are used to seeing life and death, and their emotional fluctuations will often be very small. They may have some thoughts at first, but as they gain more experience, such emotional fluctuations will become smaller and smaller.
"Maybe he's retiring soon!"
He has been a forensic doctor all his life and is about to retire. For him who loves this profession, it would be good for him to stay a second longer.
"By the way, you came just in time, I have something for you to look at."
As if thinking of something, he quickly put out the cigarette in his hand and threw the cigarette butt into the ashtray.
He got up and returned to the decryption room and got a report.
"Take a look at the tests we did overnight, we found LSD in the corpse."
"LSD?"
Miao Xiaofeng curiously took the test report and found the active ingredient of LSD.
"I didn't expect that just after an old drug trafficking group was wiped out, new drugs would appear on the market so quickly?"
Miao Xiaofeng murmured to himself.
Of course he knows about LSD. I believe many people have seen what the drug looks like. There are powders, liquids, solids, pills, and tobacco. But I believe not many people have seen the drug in the shape of paper.
LSD was made into the shape of a piece of paper. Because the shape of the drug resembled a "stamp", it was relatively new, so the police called it a new type of drug.
"Actually, in terms of time, this kind of drug is old-fashioned and not new. It has been very popular in American society as early as the 1960s. It is known as the king of psychedelic drugs, a kind of psychotropic substance with strong hallucinogenic effects.