Chapter 10 Hidden Bloodstains
Xu Dayuan went to check the surveillance footage to find the person, while Zhou Ning and the others quickly checked the two cars.
Touching the Volkswagen CC, Zhou Ning thought to himself and submitted a temporary task: This is the vehicle that caused the accident.
After waiting for a long time, the system didn't respond at all.
Unlike the first time the task was submitted, it directly popped up saying that the task was submitted successfully and the reward was drawn. What's the reason for this? Did I answer wrong?
This idea was directly overturned by Zhou Ning. If it was wrong, according to the nature of this system, it would have jumped out and downgraded the previous reward.
If you think about it carefully, this temporary task seems to have two requirements.
That is to find the vehicle and the person who hit the deceased. It seems too hasty. He didn't even think about submitting the task for the first time. This idea just popped into his mind and he passed the task.
Zhou Ning's eyes flashed, which meant that the current answer was not wrong, but just not up to standard, or in other words, his answer was correct, but not comprehensive enough and lacked evidence.
Ding ding, two beeps rang in my ears, and a task submission page popped up on the transparent display screen with three conditions appearing on it.
evidence?
driver?
The vehicle involved in the accident?
Zhou Ning grated his teeth. Oh my god, it was just as I expected. You are setting a trap within a trap. If I hadn't analyzed it myself, I would never have been able to submit this task. After all, the submission page hasn't even been opened.
With a sigh, Zhou Ning looked at the criminal police officers surrounding the car. Zhao Xinli had already taken down the investigation box and distributed the things.
Collecting fingerprints does not require any technical skills, it just requires carefulness. Zhou Ning did not rush to get into the car. He carefully swept the door handles, windows, upper edges of the doors, central control switches and other places that could be touched when opening and closing the doors with a brush dipped in special powder.
Several fingerprints appeared, and Zhou Ning carefully extracted them.
"Xiao Zhou, forensic doctor, I found a few fingerprints here too."
Zhao Xinli was kneeling on the passenger seat of the Nissan with an isolation suit under his knees, and sure enough, there were fingerprints and palm prints on the gear lever.
Zhou Ning carefully extracted them, held up the collected things, and looked at the Volkswagen CC on the side. Three people were searching that car, so why was there no movement at this moment?
Throwing the things to Zhao Xinli, Zhou Ning walked towards the Volkswagen CC.
"Nothing found here?"
"We only found a few fingerprints from the gloves, but nothing else. It looks like the car has been carefully cleaned, and from the smell, the interior has been cleaned."
Zhou Ning was a little dumbfounded. The car had been repaired and the interior had been cleaned so thoroughly. How could he prove that this car was the one that caused the accident?
Zhou Ning pushed the door and got out of the car, then stood in front of the car and looked at it carefully.
"Brother Zhao, do you think it's possible to repair a car that has been in an accident to such a brand new state in 24 hours?"
Zhao Xinli shook his head decisively.
"cannot."
"cannot?"
Zhou Ning was startled, and Zhao Xinli quickly opened the engine cover and pointed inside.
"Don't worry. If you do sheet metal painting, it will take forever. I looked inside and there are no signs of screws on the engine cover or other places being twisted, which means they have never been changed. The deceased's calf is not broken, but the car was running at high speed and hit his leg, causing him to fly out.
If this is the case, the damage to the car is not serious, and we can just replace the bumper and headlights, and there will be no traces. Of course, if we find a car of the same model to replace it, we will not be able to see it. As for the tires, I think they have been replaced as well. "
Zhou Ning pushed up his glasses, and the image of the deceased found at the first scene appeared on the transparent display screen, constantly rotating. Zhou Ning stared at the glass shards on the deceased's cheek and shook his head slowly.
"No, the deceased not only had fractures on her left leg tibia and fibula, but also had glass fragments on her left cheek and bruises on her eye sockets, which means that after being hit on the leg, the side of her head hit the glass."
When Zhao Xinli heard this, he leaned over to a corner of the windshield, held up a magnifying glass and looked at it for a long time. His eyes lit up instantly.
"Great job, Xiao Zhou, the windshield has indeed been replaced. Although it is original glass, the production date is wrong!"
This discovery left Zhou Ning silent.
The windshield, bumper and headlights were replaced. If these replaced items are destroyed and the suspects still deny it, then the car cannot be identified as the vehicle that caused the accident. It can only be proved that the two were involved in illegal racing and they must have missed something.
Zhou Ning stood in front of the car and didn't say anything for several minutes. Several criminal police officers seemed to want to say something but were stopped by Zhao Xinli. He had figured out the temper of this young forensic doctor Zhou. It was not a bad thing for him to fall into deep thought. Perhaps he would come up with a good idea in a while.
Zhou Ning was lost in thought. Thinking of the wound between the deceased's ribs and the on-site sampling content he learned last night, his eyes suddenly lit up.
Zhou Ning moved, found a bottle of luminol reagent [1], and quickly sprayed it evenly on the hood. Two columns and a huge blue-green fluorescent light appeared in the middle of the hood.
This discovery gave Zhou Ning more confidence. He lay down on the edge of the windshield from the front of the car and sprayed the luminol reagent into the gap where the windshield and the hood meet. Sure enough, there was a fluorescent reaction there.
On the wiper cover, Zhou Ning found two purple-black drops of blood and waved at Zhao Xinli.
"Hand me the camera and give me the swab for the sample. [2]"
Zhao Xinli quickly handed over the camera, then found the test tube and swab, came close to Zhou Ning and watched him take pictures, and asked interestedly.
"What did Xiao Zhou, the forensic doctor, find out?"
“The blood, which I suspect is the deceased’s blood, was on the wiper cover and probably wasn’t noticed when they cleaned it, and they just wiped the blood off the hood.
Although we cannot take samples here, the shapes of these two columns are exactly the same as the bloodstains on the lower edge of the right rib of the deceased. I have taken a sample of the blood. Please send it to the laboratory of the county hospital as soon as possible to compare the blood type with that of the deceased. The county hospital can do it."
Zhou Ning spoke quickly and his hands moved even faster. He dipped the swab in distilled water, collected a blood sample, broke off one end and threw it into a test tube, then handed it to Zhao Xinli.
Zhao Xinli didn't waste any time, grabbed the bottle and ran away. Zhou Ning climbed out of the car, took the fingerprints and palm prints he had just collected, went up to the second floor and went straight to the office.
Open the computer with a big-bellied display. Although it looks shabby, its performance is quite good. It also has a fingerprint matching software installed in it.
Zhou Ning entered the numbers for the fingerprints and palm prints he had just collected, and then did the same for the fingerprints marked with Yang Feiyu and Wang Fuhao on the table, and then started clicking for comparison.
Except for a few fingerprints that were too incomplete to be compared, several fingerprints showed successful comparison. Just click to print the comparison results.
Zhou Ning clenched his fist and waved it. That was great. Although there were no fingerprints inside the Volkswagen CC, Wang Fuhao's fingerprints were found on the door and gear lever of the Nissan. This proved in disguised form that Wang Fuhao did not lie and they did change cars.
As for who hit the deceased, the result is self-evident. But why would Wang Fuhao be in a hurry to repair the car and help Chen Yufei cover up the evidence?
As Zhou Ning had these thoughts, a familiar prompt sound came to his ears.
Ding, congratulations to the person who bound the task, the temporary task was submitted successfully!
Evidence: Fingerprint collection completed, blood extraction and comparison successful;
Driver: Yang Yufei;
Vehicle involved in the accident: Volkswagen 2010CC
Countdown remaining time: 33:30
Rewards are being distributed. Please allow ten minutes for loading.
Zhou Ning sat down subconsciously. After all, he still had lingering fears from the discomfort during the last loading process. Fortunately, he was in his own office this time. Sure enough, that feeling of his head bursting came again, but the degree of discomfort was not as severe as the first time.
This feeling lasted for a long time. Zhou Ning even felt that time seemed to slow down. With two dripping sounds, all the discomfort disappeared.
Zhou Ning slumped in the chair, breathing heavily, and curiously flipped through the knowledge he had learned from forensic on-site examinations. When other comparisons failed to produce any results, he flipped directly to the end of the section on rubber mark inspection and found the paper given at the end.
Sure enough, the last paper was due in 2019, [Year (Volume) Issue] 2019 (036) 008, and Zhou Ning was excited and eager to get started.
That’s awesome! This is three years of new knowledge I’ve gained.
After picking up the comparison result, before he could stand up, the office door was pushed open and Xu Dayuan strode in. Seeing the expression on Zhou Ning's face, he asked hopefully.
"What's up? What evidence did you find?"
…
PS:
【1】Luminol: Also known as luminol. Its chemical name is 3-amino-phthaloyl hydrazide. It is a pale yellow powder at room temperature and is a relatively stable synthetic organic compound.
For blood that cannot be observed with the naked eye at the crime scene, the luminol reagent can show a very small amount of blood in the form of blood (occult blood reaction). At the same time, luminol is a strong weak acid and has a certain irritating effect on the eyes, skin, and respiratory tract.
Since hemoglobin contains iron, iron can catalyze the decomposition of hydrogen peroxide, turning hydrogen peroxide into water and single oxygen, which then oxidizes luminol to make it glow. Therefore, luminol is widely used in criminal investigation, bioengineering, chemical tracing and other fields.
In forensics, the luminol reaction can identify blood stains that have been scrubbed and left a long time ago. In biology, luminol is used to detect the presence of copper, iron, and cyanide in cells.
[2] Swab: It can be understood as an extended version of a cotton swab with a breakable head. It is usually used as a tool for medical examinations to collect microorganisms, exfoliated cells or secretions.
