Murong Fei's mood was a little complicated, and he said, "Su Yi, do you think a miracle will happen again?" For Hu Daxiong, the probability of a miracle is even lower. Pen | fun | pavilion www. ｂｉｑｕｇｅ。 ｉｎｆｏ”

Su Yi looked confused, she said: "If the cause of death can't be determined, will you be very passive about the case?" ”

Murong Fei nodded and said: "That will definitely have an impact, but the evidence is all working on each other, and it will not be hanged on a tree, the east is not bright, and the west is bright." By the way, I remembered that from the outside, the car was almost undamaged, that is, Hu Daxiong was in a high-speed car, directly into the water, and there was no violent collision, and there were no obvious fractures. ”

"Moreover, if Hu Daxiong went into the water alive, then the most likely cause of death is drowning, and I think it is almost impossible to determine whether a skeleton that entered the water nine years ago drowned."

After Murong Fei finished speaking, he began to imagine there, as if he had returned to that day nine years ago.

He seemed to see Hu Daxiong driving the Citroen with five gears, quickly passing through the bridge, but accidentally drove the car into the canal, the river water slowly poured into the car, and sank to the bottom of the water, Hu Daxiong gradually inhaled a lot of river water, and finally died in a coma.

Murong Fei began to examine Hu Daxiong's bones, not letting go of any details, he and Su Yi carefully cleaned every bone, but did not find any fractures.

Murong Fei also thought of examining the temporal bone and face of the skull, and he saw that Hu Daxiong's temporal bone and face did have some color changes, but it was not obvious, just such a little change, he didn't dare to think of it as a change caused by suffocation caused by drowning.

Eventually, he came up with the idea of taking a sample of the bone for diatom testing, which was perhaps the last step of the day, which was made even more difficult because there were no organs left.

Murong Fei took the femur of a thigh and came to the diatom laboratory, the biggest difference in this laboratory is that the exhaust system is particularly strong, because during the diatom test, there is an important step is nitrification, which requires nitrification of the bones with nitric acid, dissolving the bones, and finally leaving only diatoms that nitric acid cannot destroy.

Murong Fei opened the fume hood, and the fume hood made a "hissing" sound and began to extract the air in the fume hood.

He repeatedly cleaned the long bone with distilled water, then slowly sawed it open with a hand-made saw, removing a small piece of bone marrow from the middle and placing it in a clean ceramic container, which he used to nitrate human tissue.

Seeing that everything was ready, Su Yi asked Murong Fei and said, "Murong, is it possible to add nitric acid now?" ”

Murong Fei took off his gloves, put on another thicker pair of gloves for himself, and said, "Yes, you can add nitric acid now." ”

Su Yi took a bottle of pure nitric acid and carefully handed it to Murong Fei, her face was very nervous, because she knew that this nitric acid was too terrible, if she was a little careless and broke the bottle, the consequences would be unimaginable.

Murong Fei didn't care very much, because he was already familiar with the operation of nitric acid to test diatoms, and he had already calmed down on this seemingly dangerous operation.

He took the nitric acid bottle that Su Yi handed him, unscrewed the lid, looked at the mouth of the bottle, and began to pour nitric acid into the ceramic container.

As soon as the nitric acid entered the container, it came into contact with the bone that had just been sawn off, and there was a violent reaction, and a puff of white smoke rose above the container.

Because of the strong effect of the exhaust fan, the white smoke was pumped away by the exhaust fan as soon as it rushed out of the container.

Because Su Yi had never done this experiment, seeing this change, he was extremely nervous, Murong Fei turned around and smiled at her, and said, "What?" Scared? ”

Su Yi blushed and said, "Well, it's really a little, let me try it next time, I also want to overcome this problem." ”

Murong Fei saw that the nitric acid dose in the ceramic container was enough to dissolve the bone, so he erected the bottle, tightened the lid again, and then laid the bottle flat on the operating table.

He said to Su Yi: "If you operate it a few times, this experiment is not difficult at all, the difficult thing is that the materials just now, to be free from pollution, our usual water contains diatoms, even if it is tap water, it also contains diatoms, so it is necessary to wash the bones repeatedly with distilled water, and then you can start sawing, and the materials cannot be taken from the surface, and the surface is easy to be polluted." ”

Su Yi nodded and said: "It's also a bit amazing to say, when a person is drowning, this little diatom enters the lungs with the inhaled water, and then enters the blood system through the alveoli, and quickly distributes to the whole body, even the bones, and the previous forensic scientists didn't know how to come up with how to test the diatoms." ”

Murong Fei said with a smile: "You see, when we were in college, there were a lot of forensic textbooks, weren't they all summed up by the old-timers, this is the most terrifying thing about us human beings, everything can only be accumulated over the years, and it will show different effects." ”

Su Yi saw that the bones in the ceramic container had been digested, so he said, "Yes, knowledge is great, you see that even the bones have been nitrated by us." ”

Murong Fei also looked at the container and found that the nitrification process had basically ended, so he said, "It's almost over, I'm going to move on to the next step." ”

When he finally filtered and removed the slag, he turned the bones into a bottle of clean extract, and he said: "Su Yi, whether there are diatoms in Hu Daxiong's bones depends on here." ”

At the same time, Murong Fei also processed the water samples taken from the canal and made them into films, which were observed under a microscope.

He found that there were still many types of diatoms in the water samples in the canal, and he could see that there were at least five types, some in the form of long strips, some in the form of radials, and one kind of chain.

After Murong Fei saw this, he began to feel apprehensive, it was expected that the canal water sample contained these types of diatoms, the key was that the same type of diatoms should be detected in Hu Daxiong's bone nitrification extract, so that Hu Daxiong could be determined to drown in this canal, and before drowning, the lungs inhaled a large amount of water, which entered the blood through the capillaries of the alveoli and circulated to the bones.

With trepidation, he used a dropper to absorb a small amount of Hu Daxiong's bone nitrification extract, and dropped it on a glass slide, and he saw that the liquid was crystal clear, like a molten crystal.

Cover the coverslip, the slide is ready, Murong Fei stuffed the slide under the microscope, ready to start observing.

Before observing, he took a small deep breath, as if it would bring him good luck.