Chapter 10 Hidden Blood Trace

Xu Da went to inspect the surveillance and inspect the people, and Zhou Ning and the others quickly checked the two cars.

When Zhou Ning touched the Volkswagen CC, he thought to himself and submitted a temporary mission: This is the vehicle that caused the accident.

After waiting for a while, the system did not respond at all.

Unlike when the first task is submitted, I jumped out and said that the task is submitted successfully and the reward is drawn. What is the reason for this? I answered wrongly?

This idea was directly overturned by Zhou Ning. If it was wrong, according to the nature of this system, it would have long since jumped out to downgrade the previous reward.

If you think about it carefully, this temporary task seems to have two requirements.

That is to find the vehicle and perpetrator who caused the accident that injured the dead. It seemed to be hasty. He didn't think about submitting the first mission, but this idea popped up in his mind, and the mission was over.

Zhou Ning's eyes flashed, which means that the answer is not wrong now, it is just not standard enough, or his answer is correct, but not comprehensive enough, and lacks evidence.

Didi, I thought twice in my ears, and a task submission page popped out of the transparent display, with three conditions appearing on it.

evidence?

Driver?

Vehicle that caused the accident?

Zhou Ning was wrong, I went, it turns out that way. You are trapped in the pit. If I hadn't analyzed it myself, this task would not be submitted. After all, this submission page has not been opened.

With a sigh, Zhou Ning looked at the criminal police officers who were circling around the car. Zhao Xinli had already taken down the survey box and distributed the things.

The collection of fingerprints has no technical content, it is just careful. Zhou Ning didn't rush to get on the car. The door handle, windows, upper edges of the door, and central control switches. Zhou Ning carefully swept through the places where the doors could touch with a brush dipped in special powder.

Several fingerprints appeared and Zhou Ning carefully extracted them.

"Forensic Xiao Zhou, I have also found a few fingerprints here."

Zhao Xinli was kneeling in the Nissan co-pilot, with an isolation suit under his knees. Sure enough, there were fingerprints and palm prints on the gear handle.

Zhou Ning carefully extracted it, held the collected things and looked at Volkswagen CC on one side. The car was searching for three people. Why was there no movement at this moment?

Throwing the thing to Zhao Xinli, Zhou Ning went to Volkswagen CC.

"Have you found nothing here?"

"I just found a few fingerprints of the wire gloves, but I found nothing else. It seems that the car has been cleaned carefully and has done the interior cleaner with smell."

Zhou Ning was a little stunned. The car had been repaired and the interior was cleaned so thoroughly. How did it prove that the car was the vehicle that caused the accident?

Pushing the door and getting out of the car, Zhou Ning stood in front of the car and looked at the car carefully.

"Brother Zhao, you need to repair a car that was in a car accident in such a brand new state in 24 hours. Do you think it's possible?"

Zhao Xinli shook his head decisively.

"cannot."

"cannot?"

Zhou Ning was stunned. Zhao Xinli quickly opened the engine cover and pointed to it and said.

"Don't worry, if you do sheet metal painting, you will naturally not finish it. I looked inside, and there were no signs of twisting the engine cover and screws in these places, which means that these have not been replaced. The deceased's calf was broken, which means that the car speed hit the deceased's leg and directly lifted the person out.

If this is the case, the car will not be seriously damaged, and you can just replace the bumper and headlights, so there will be no trace. Of course, if you find the same car to replace it, we will not be able to see it. As for the tires, I have also replaced them."

Zhou Ning pushed his glasses, and the image found at the first scene of the deceased appeared on the transparent display screen, and it was still rotating. Zhou Ning stared at the glass slag on the deceased's cheek and slowly shook his head.

"No, the deceased not only had the tibial fibula fractures on her left leg, but there were glass debris on her left face and bruises on her eye sockets. This means that after the leg was hit, the side of her head hit the glass."

When Zhao Xinli heard this, he lay on a corner of the windshield from the side, held up a magnifying glass and looked there for a long time, and his eyes lit up instantly.

"Awesome forensic doctor Xiao Zhou, this windshield has indeed been replaced. Although this is the original glass, the production date is wrong!"

This discovery made Zhou Ning silent.

If the windshield, bumper and headlight are changed, if the replaced items are destroyed and the suspect refuses to admit it, the car cannot be identified as the vehicle that caused the accident. It can only prove that the two of them participated in the illegal racing car, and they must have missed something.

Zhou Ning stood in front of the front of the car and did not speak for several minutes. Several criminal policemen seemed to want to say something, but were stopped by Zhao Xinli. He had figured out the temper of this forensic doctor Zhou. It was not a bad thing for him to fall into deep thought. Maybe there would be some good idea in a while.

Zhou Ning, who was thinking about the intercostal injuries of the deceased and the on-site sampling content learned last night, suddenly lit up his eyes.

Zhou Ning moved, found a bottle of luminol reagent [1], and quickly sprayed evenly on the hood. At the middle of the hood, two columnar and a huge blue-green fluorescence appeared.

This discovery made Zhou Ning's confidence multiply. He lay on the edge of the windshield from the side of the front of the car and sprayed the luminol reagent in the gap between the windshield and the hood. Sure enough, there was also a fluorescence reaction here.

On the cover of the wiper, Zhou Ning found two purple-black blood drops and waved his hand at Zhao Xinli.

"The camera handed me the swab to take samples [2]."

Zhao Xinli quickly handed over the camera, then found the test tube and swab, came to Zhou Ning to look at him taking pictures, and asked enthusiastically.

"What did the forensic doctor Xiao Zhou discover?"

"Bloods, I suspect this is the blood of the deceased. It fell on the wiper cover. I guess it was not found when I cleaned it up, but I just wiped the blood from the hood.

Although it is impossible to sample here, the two columnar shapes are exactly the same as the blood stain on the lower edge of the right rib on the deceased's right rib. I have sampled the blood drip. I will hurry up and send this to the laboratory of the county hospital to compare the blood type with the deceased. This county hospital can do it."

Zhou Ning spoke very quickly and his hands were moving faster. The swab dipped in distilled water, collected a blood-stained sample, broke one end and threw it into the test tube, and handed it to Zhao Xinli.

Zhao Xinli didn't say anything nonsense, grabbed the bottle and ran away. Zhou Ning climbed out of the car, took the fingerprints and palm prints he had just collected, and went up to the second floor and headed straight to the office.

Turn on the computer with a big belly display. Although the computer is broken, the performance is pretty good. There is also a fingerprint comparison software installed inside.

Zhou Ning entered the fingerprints and palm prints he had just collected into the numbers, and marked the fingerprints of Yang Feiyu and Wang Fuhao on the table, and then started clicking and comparing.

Remove a few that are too incomplete and cannot be compared. Several fingerprints are displayed successfully. Click to print the comparison result directly.

Zhou Ning clenched his fists and waved it. It was great. Although there was no fingerprint in Volkswagen CC, Wang Fuhao's fingerprint was found on the Nissan's door and gear handle. This proves in disguise that Wang Fuhao did not lie. They did drive in a change of cars.

As for who hit the dead, the result is self-evident. But how could Wang Fuhao rush to repair the car and help Chen Yufei cover up the evidence?

As Zhou Ning's thoughts emerged, the familiar reminder sound came to Zhou Ning's ears.

Did, congratulations to the binder, the temporary task was submitted successfully!

Evidence: fingerprint collection was completed and blood stain extraction and comparison were successful;

Driver: Yang Yufei;

Vehicles that caused the accident: Volkswagen 2010CC

Countdown remaining time: 33:30

The reward is being issued and the loading time is ten minutes.

Zhou Ning subconsciously sat down. After all, the discomfort in the last loading process made him feel scared. Fortunately, he was in his office. Sure enough, the feeling of rising and losing his head came again, but the degree was not as uncomfortable as the first time.

This feeling lasted for a long time, and Zhou Ning even felt that time seemed to be slowing down. With two dripping sounds, all the discomfort dissipated.

Zhou Ning sat in a chair, gasping for breath, curiously looking through the knowledge learned by the forensic doctor on the spot. No other comparisons could be compared. He turned directly to the end of the rubber mark inspection part and found the paper given later.

Sure enough, the last paper was in 2019, [Year (Volume) Issue] 2019 (036) 008, Zhou Ning was excited and ready to go.

It's awesome, this is another three years of new knowledge.

Picking up the comparison result, before he could get up, the office door was pushed open directly. Xu Dayuan stepped in and asked with a long time to see the expression on Zhou Ning's face.

"How is it? What evidence has been found?"

PS:

【1】Luminol: (Luminol), also known as luminescent ammonia. The chemical name is 3-amino-phthalidylhydrazide. It is a pale yellow powder at room temperature, which is a relatively stable artificially synthesized organic compound.

For blood that cannot be observed at the crime scene, luminol reagents can show extremely small blood stains (occult blood reaction). At the same time, luminol is a strong weak acid that has a certain irritating effect on the eyes, skin, and respiratory tract.

Because hemoglobin contains iron, iron can catalyze the decomposition of hydrogen peroxide, turning hydrogen peroxide into water and monooxygen, and monooxygen reoxidizing luminol makes it shine. Therefore, luminol is widely used in criminal investigation, bioengineering, chemical tracer and other fields.

Forensic science, luminol reactions can identify blood marks that have been scrubbed and long ago. Biologically, luminol is used to detect the presence of copper, iron and cyanide in cells.

[2] Swab: It can be understood as an extended cotton swab, with a broken head and is usually used as a medical tool for collecting microorganisms, shedding cells or secretions.
Chapter completed!