novice forensic medicine

Chapter 87

Nov. 2011, 3

Zhou Ning quickly came to the small second floor of the criminal police team. As soon as he walked to the forensic room, he heard a voice next door. He was slightly surprised, and looked at the time on his watch. It was only 7:30 at this time. Could it be that these people just come?

Tiptoe through the window on the door to see that many of them are busy inside.

Zhou Ning shook his head. These are all technical lunatics. He hurried back to the office, turned on the computer, and directly logged into the mailbox. He was anxious to know the test results. After all, no test report was given yesterday, and Xu Dayuan quarreled with the test center. Fan.

Fortunately, there were three unread emails in the mailbox, and Zhou Ning quickly clicked to receive them.

Passing over everything else, he went straight to the test of the vaginal extract, but found no rice green seeds, only a variety of oils, the composition analysis is a common ingredient used to smear on the surface of the elves, but in the body fluid, an extract that does not belong to A DNA sample of the deceased.

And below this DNA sample, there is a line of red fonts that read:

In particular, the sex chromosome of this DNA sample is XXY.

Zhou Ning's heartbeat accelerated when he saw the red letter. Such a special DNA is too specific.

Zhou Ning quickly flipped through the tests at the back. After all, there was also blood on the windshield. When he found the last page, the remaining blood was indeed consistent with another DNA found in the body of the deceased. Zhou Ning patted the table hard twice.

You guessed it right, you guessed it right, it seems that the murderer realized that the deceased came out alone suddenly, so he improvised. As for the DNA residue in the deceased's body, there were either skin flakes and grease on his hands, or there were injuries on his hands.

Of course, Zhou Ning was more inclined to the latter. He had a wound on his hand that rubbed against the windshield, and when he violated the deceased, he didn't pay attention to the wound. After all, [-]% of XXY patients don't have Mi Qingzi.

At the same time as clicking print, the door was opened, Liu Yongxin walked in with eight steps, followed by Da Zhao, who paused slightly when he saw Zhou Ning with bright eyes.

"Early in the morning, what did you eat, so excited, you picked up the dog's head gold?"

Zhou Ning said with a smile:

"Almost, the inspection report is out."

Liu Yongxin hurried to the printer and read the reports one by one. When he saw the boss who opened his mouth at the end, Da Zhao stood behind Liu Yongxin and read it too, scratching his head and looking puzzled.

"What does XXY chromosome mean?"

Zhou Ning is in a good mood and is naturally willing to answer.

"Should have learned it in biology class. Among the sex chromosomes, males are XY and females are XX. People with XXY chromosomes usually show the physiological characteristics of XY males. Individuals with androgen deficiency may have different degrees of feminization secondary sexual characteristics.

For example, he looks like a man, but his appearance is very short, his Adam's apple is not obvious, his chest has no pectoralis major muscle but has fat thickening and development, his testicles and beard are underdeveloped, his reproductive organ may be normal, but he has no sperm, or he is accompanied by There is low function.

Tennis player Sarah Gronelder is an XXY androgynous person. At the age of 19, she had undergone a male genital mutilation operation, and she was physically a woman. Later, she participated in various women's competitions. "

Big Zhao opened his mouth wide, unable to recover from the shock for a long time.

"That is to say, the murderer is Erjiazi?"

Liu Yongxin paused, not particularly excited, but worried.

"This DNA is obviously different from the DNA in the assisted investigation announcement issued by the Municipal Bureau, so does it mean that this case has nothing to do with the serial murder in red?"

Zhou Ning nodded, he also thought of this.

"I don't think it is an extension of the Hongyi serial murder case. It has nothing to do with our detection of this case. Let's do our own thing. If there is a connection, or overturns the previous investigation by the city bureau, that's something for another story. After all, from the current point of view, the red clothes and fingerprints are the only common ground."

Liu Yongxin let out a breath.

"Tell Dr. Lu, aren't they still working on the restoration of the skulls of the five unknown people?"

Zhou Ning picked up a printed material and nodded towards Liu Yongxin.

"Let me tell you, Master, you can give Xu Da this set. I think I can be so clear about my illness and dare to assault the victim with confidence. This murderer must have been checked, and we can start from this aspect."

Liu Yongxin smiled.

"It's exactly what I thought it would be."

Zhou Ning took the report and walked to the next door. Dr. Lu quickly waved his hand when he saw Zhou Ning.

"Forensic doctor Zhou came to take a look, we have made progress here."

Zhou Ning folded the report in his hand and walked to Dr. Lu. He is here to help you. No matter what, this enthusiasm cannot be dampened, so he did not rush to talk about the report.

Dr. Lu pointed to the display screen, which is not the size of an ordinary computer, it is a [-]-inch LCD screen, on which five women's headshots appear in color, and there are optional skin colors and hairstyles next to the headshots. , Iris color options.

After looking at it carefully, he found that these five people have short hair at the ears, and the skin color and hair color are the same. However, after a cold look, these five people seem to have some similarities. He can't tell where they are similar. Several people are very similar.

"In terms of details, we haven't adjusted it. This is synthesized according to the software, and various data of the facial features have been calculated, but the length of the hair color and so on, you can help me to take a look, this is the dossier at that time."

With that said, Dr. Lu handed Zhou Ning a tablet computer with some electronic files on it. Zhou Ning put the report on the table and began to browse through it one by one.

The clarity of the photos at the scene is very high, but don’t think that the skin color of the high-rot corpse is in the state of soaring purple and black. There are many abuse injuries on the face. As for the iris, it is impossible to distinguish. It starts to get cloudy, and after 24 hours, it becomes completely opaque.

Zhou Ning narrowed his eyes and stared at the composite image of five people for a while. Xiao Qu leaned over and handed the control handle to Zhou Ning. Zhou Ning chose the hairstyle, skin color and iris color last time. judgments are more convincing.

"Forensic Zhou, you can make adjustments."

Zhou Ning didn't shirk, held the control arm, stared at the first restoration picture, thought of Cheng Chunyan's appearance in his mind, changed the hair to chestnut brown, changed the hairstyle to long curly hair, and then adjusted the skin color to fair The color of the iris is also changed to dark brown, after all, most of the yellow people are this color.

After such adjustments, click Apply, and the No. [-] restoration map has completely changed. Dr. Lu propped his chin with one hand and stared at the restoration map.

"Why do I feel that this victim is a bit like the recovered Cheng Chunyan?"

Zhou Ning nodded.

"These people all have something in common. They have long-distance eyebrows, long-distance pupils, thin lips, inconspicuous zygomatic arches, and slightly protruding jaws. I don't know if there are any photos of the previous six identifiable victims. You can compare them here. "

Dr. Lu suddenly realized, and hurried to search on the computer. Zhou Ning kept moving, and quickly changed the remaining four restoration pictures one by one. Except for the hairstyle, he selected the same parameters as the first restoration picture.

At this time, more and more people gathered beside the display screen. Everyone stared at the restoration picture and kept talking about their thoughts, and Xiao Qu moved closer.

"This can also display makeup, but I don't have many types of input."

Zhou Ning shook his head with a smile. He doesn't understand makeup, but after adjusting to this state, it is enough to search in the household registration system.

Before he could say anything, Dr. Lu had already walked over excitedly, holding the laptop and showing it to Zhou Ning.

"Forensic doctor Zhou, look at the photos of the six victims. I just realized that these six girls are younger and still studying in school, but their hair is all wavy and dyed."

Zhou Ning took it over and took a closer look. There were two photos on each page, one was the victim's ID photo, and the other was a photo of the scene. You could clearly see the demarcation line of the deceased's dyed hair, as well as the curly state of the long hair.

"I just saw that in the survey reports of the five victims, the estimated stature of the deceased was around 160 cm tall and weighed 80-90 catties. It seems that the murderer had a special personality for curly chestnut brown hair and thin women. preference."

Zhou Ning paused, and then said:

"Dr. Lu, the inspection report of our case came out, and a special DNA was found in the deceased's body and on the windshield, but it has nothing to do with what was announced in the Municipal Bureau's assisted investigation order. Maybe this is not the No. 12 serial murder case in red. "

Dr. Lu waved his hand.

"Don't get caught up in these rules and regulations. Those of us who are engaged in scientific research must see real results in everything. We didn't say we were going to find fault with the Municipal Bureau, so we just took it as an experiment. Hurry up and put the recovery pictures of these five people in the household registration system. Search and try!"

(End of this chapter)