novice forensic medicine

Chapter 137 Can't see the driver's face clearly

The next day, Zhou Ning came to the laboratory quickly, and Cui Lili opened the door before he opened the door.

"Morning Miss Cui!"

"It came early enough, and the results came out. CA125, carcinoembryonic antigen CEA, and squamous cell carcinoma antigen SCC were not found, but there are some special toxic reactions. You can see for yourself."

As he spoke, Cui Lili threw the report into Zhou Ning's arms. He quickly scanned it, and after reading it, Zhou Ning's eyes widened in surprise.

The tested substances are: coumarins and indanediones.

Then he listed a large list of brand names of drugs that may contain this toxin, such as Warfarin, Muratami, Dalong, Bromadiolone, Shatazhan, Diratine Sodium Salt, and Chloradipate. Zhou Ning thought about it for a while.

"The toxin content in Sister Cui's deceased body was not high. You mean, he was poisoned for a long time. Originally, the drug has a delaying effect, and the onset usually occurs about a week after taking it. That can also explain that the digestive tract and bronchi Symptoms of bleeding."

"Last year, I did a test on a case. At that time, bromadiolone was used. This rodenticide is relatively easy to obtain. The murderer stole the drug from a pig farm."

Zhou Ning smiled gratefully at Cui Lili. Although Cui Lili was very cold and unsmiling on the surface, she never let go of the test.

"Thank you, Sister Cui. By the way, I gave you this USB flash drive. I was a teacher who specialized in poison testing and testing before going abroad. I have some experience. He sent this to me a few days ago. They are all relatively advanced in the world. Assay methods and comparison means."

Cui Lili paused, and reached out to take the USB flash drive.

"Thank you, I'll go back and have a look."

Zhou Ning didn't stay long, and left directly. In fact, the things in the USB flash drive were all based on his memory, and he sorted out the toxicological analysis learned in the system. After all, it was published in 2022. After all, it is more advanced than the current test and comparison. right way.

Zhou Ning walked quickly to the first team of criminal police. The door of the meeting room was wide open. There were several people sitting inside, surrounded by smoke, and they felt obstructed to breathe when they got close.

However, several case bags on the table caught Zhou Ning's attention, and Xu Dayuan waved his hand towards Zhou Ning.

"Come in and sit down, what did you find?"

Zhou Ning was not polite, and went to open the window of the conference room, then returned to the table, and put a stack of reports in front of Xu Dayuan.

"The deceased's vehicle was inspected for a second time. Except for the fingerprints of the deceased, no fingerprints of the second person were found. To be precise, no fingerprints were found except for the door, steering wheel, gear lever, and seat belt. The interior of the vehicle was carefully cleaned. Pass."

Xu Dayuan was stunned. Although there was no substantial discovery in this news, it showed that the murderer or the person who planned all this had a strong anti-reconnaissance awareness and knew that leaving fingerprints would arouse suspicion.

"It's amazing? Did you find anything else?"

Zhou Ning didn't answer, but instead opened all the case bags on the table, with the names of major hospitals on them, and plastic or kraft paper bags would be given to the X-rays, each with Zhang Guanglei's name written on it, obviously Zhang Guanglei has been Feeling sick, and very sick.

"This was found at the deceased's house? Where was it hidden?"

Xiao Liu smiled, this girl has a quick mouth.

"At that time, I was patronizing to turn off the water valve, and the search was not careful. These things were hung behind the door of the second bedroom, blocked by some clothes and calendars, so they were not found."

Zhou Ning had already taken out various medical certificates at this time and looked them over. The patients complained of nosebleeds, headaches, stomach pains, coughing up blood, occasional bloody stools, and hair loss in February 2010. After various examinations, No organic disease was found.

Of course, what follows are the diagnoses of major hospitals, the content of which is similar. Some doctors prescribed drugs that affect the nerves to protect the gastrointestinal mucosa, and drugs that relieve cough and smooth muscle. One doctor even suggested that he see a psychiatrist.

Zhou Ning put down these medical certificates and put the test report in front of Xu Dayuan.

"It seems that the deceased found that his body was abnormal. The test results have just come out. The blood and organs of the deceased's heart contain coumarins and indanediones, but the accumulated amount is not very large.

Oh, I forgot to introduce, this drug is an anticoagulant rodenticide, such as warfarin and Dalong, it is a kind of poison manifested by chronic poisoning, and it usually takes six or seven days to take effect.

Obviously, the poisoning process was very long, and the murderer didn't want to be suspected. Judging from the time he went to make a diagnosis, the deceased had at least discovered that his body was abnormal. It had been more than a year. If it wasn't for long-term close contact, the effect of the drug could not be maintained like this of. "

Xu Dayuan nodded.

"This analysis makes sense. It seems that we still need to find clues from the private life of the deceased. Has Zhenshan replied?"

Xiao Liu shook his head.

"No."

Zhou Ning rubbed his nose, he knew Xu Dayuan was in a hurry, but it was not something to be in a hurry.

"How about I ask Da Zhao and Sun Gaotie to go to the deceased's house and check the fingerprints left at the scene."

Xu Dayuan nodded.

"Okay, Xiao Liu Ni and Zhou Forensic Doctor went to the technical department, then Da Zhao and Xiao Sun went to the deceased's house to have a look. The fingerprints on the car are so clean, there may not be anything left in the house, but it's better to take a look and rest assured, by the way. Call the monitoring, check the monitoring of the community, is there a driving recorder in the deceased's car?"

Zhou Ning shook his head.

"No, I checked this at that time."

"Okay, let's go, Teacher Xia and the others' animations come out, let me know as soon as possible."

Zhou Ning did not expect that Xu Dayuan still remembered this incident, nodded and took Xiao Liu away. When they arrived at the technical department, Da Zhao and the others had already come down. In fact, her name was Xiao Liu. She was two years older than Zhou Ning, and her real name was Liu Yufei, it's definitely not easy for a girl to be a capable criminal police officer. I heard that Liu Yufei's skill is not that many men in the team can beat her.

"Forensic Doctor Zhou, I'll take Da Zhao and the others there."

Saying goodbye to Liu Yufei, Zhou Ning went upstairs to the laboratory. Liu Yongxin was standing by the computer, talking to Xia Momo. Xia Momo kept flipping her hands on the keyboard. Discovering this way, Zhou Ning felt ashamed of his prejudice at the beginning.

Gently opened the door, walked straight over, Xiaoqu saw Zhou Ning first.

"Forensic Doctor Zhou is here!"

Zhou Ning nodded with a smile. Only then did Xia Momo find Zhou Ning and looked at him with a smile.

"Just right, the animation has been done. According to the degree of damage to the vehicle and the distribution of forces in various aspects, we have synthesized this animation. You can take a look at it first."

Zhou Ning came closer, and Xia Momo started to click to play. On the screen, a black Sonata crashed directly towards the light pole. The first impact caused the upper part of the light pole to snap off, and fell to the distance.

Inside the car, the driver was lying on the steering wheel, and the sequence of fractures appeared. Of course, the fracture of the left temporal part was marked as the original fracture, and this parameter was not recorded.

The chest of the deceased was fixed by the steering wheel. Zhou Ning squinted his eyes. According to the degree of impact, even a comatose person might wake up. not around.

At this moment, the rear of the Sonata was hit by a white Wrangler. The height of the Wrangler was much higher than that of the Sonata, so the squeeze on the front car was more severe. The space of the Sonata cab was shortened by half, and the front engine was completely covered. lamp post.

With such a shock, the broken street light pole fell off from the broken position, smashed through the Sonata's windshield, and directly poked the dead man's face.

However, the Wrangler driver behind was not as seriously injured as Zhang Guanglei. Why didn't he call the police or an ambulance immediately?

Zhou Ning was thinking, the Wrangler was hit sideways, the rear of the car was thrown directly into the driveway, and then seven or eight cars appeared behind, like dumplings, directly hitting the Wrangler's car.

Such a chain reaction was very rapid, and Zhou Ning also suddenly realized that if the Wrangler escaped immediately, he might still survive.

It can be seen from this that it is unlikely that the Wrangler deliberately bumped into Zhang Guanglei, and it is unbelievable to move sideways.

After the animation demonstration, the Sonata was so compressed that the most important impact was the last chain reaction. Of course, Sun Manqing, the driver of the Wrangler, also died because of the last impact.

"During this interval, did you check the section of the road that was not covered by the fog?"

Momo Xia smiled and rolled her eyes.

"We can't hide anything from you. We retrieved the road surveillance video on the road section 100 meters east of the accident location. The speed and interval time were all obtained from that video. But to my surprise, the last car turned out to be Can't see the driver."

Zhou Ning paused.

"What does it mean that you can't see the driver? Didn't you use our software to fix it?"

(End of this chapter)