novice forensic medicine
Chapter 568 The DNA on the pinch marks
March 9 6:16
Zhou Ning has come to the Criminal Technology Center of the Public Security Bureau of Southern Henan Province, where Zhu Xingxing has borrowed the dissection room from the director of the center under the banner of Zhou Ning. Zhou Ning was surprised by this ability.
The conditions inside are quite good, and there is a transparent patio above the head. Obviously, this is the kind of dissection room that can carry out teaching work.
The corpse was placed on the dissecting table, after thawing, and the freezer was placed next to it. Zhou Ning couldn't help but hold his forehead, and he couldn't boast. He brought this thing back with him, which Zhou Ning didn't expect.
"Did you take a picture of the scene?"
Zhu Xingxing nodded, found the photo himself, and enlarged it on the display screen. Zhou Ning glanced at it. The spare parts warehouse is not small. There are three freezers on the left and right. Shelves, various plastic boxes, with product names on them.
As for the corner of the freezer with blood, it's on the left side of the door.
Zhou Ning nodded, and walked to the corpse. The corpse had already thawed out, but the black dress was not taken off, and it was all pasted on the corpse.
The cuts on the face looked more severe than in the video, especially after thawing, the blood flowed out, and the bones could be seen deep, but the skin of the wound did not curl up, and the wound above the pubic symphysis was the same, and the finger marks on the neck were very clear.
Zhou Ning stretched out his hand for comparison. It was smaller and shorter than his hand, and his fingers were more slender.
"Have you collected DNA yet?"
Zhu Xingxing nodded and found a list.
"I collected a large number of fingerprints and DNA from the deceased's body surface, mouth, vagina, nails, nasal cavity, inside and outside of the freezer, vehicle, inside and outside of the spare room door, as well as the ground and the freezer with a positive luminol reaction.
Of course, the head chef, all the staff in the back kitchen, the lobby manager, etc., and the internal staff of the Blue Ocean Hotel, I also collected fingerprints and DNA.
There were 11 people who left fingerprints and DNA, and 8 fuzzy fingerprints could not be distinguished. I think it is too old to be ignored. However, a female DNA was found on the neck of the deceased and in the extract of the facial wound of the deceased.
The hair found on Liu Meiling's vehicle, as well as the extracts from the steering wheel, were compared with those of the deceased. Sister Cui just sent the DNA of Liu Meiling's parents. The comparison results showed that Liu Meiling's parents were the biological parents of the deceased. "
Zhou Ning paused and gave Zhu Xingxing a thumbs up. Without the large-scale sample collection before, the possibility of finding DNA is very low.
"It's amazing. You can make such a discovery on the second day after you come here, which shows that you are very careful in your work."
Da Zhao curled his lips, wanting to say a blow, but before he could move, he found his foot was being stepped on by Zhou Ning, Da Zhao quickly shut up, Zhu Xingxing shook his head happily, a little embarrassed.
"Actually, the square team has searched almost the entire perimeter. When I came, I told the leader's opinion. He thought it made sense, so he began to search overnight, mainly searching the interior of the hotel. Only then did he find the spare parts warehouse in the early morning. The problem, the hotel was also very shocked.
The head chef said that he came here to work a year ago. This spare parts warehouse is basically only entered once during the inventory, and no one usually enters. Because of the design, the basement here is not connected to monitoring, but the camera is hung. That's right, many people don't know that the thing is not connected to the Internet. "
Da Zhao's eyes widened, and he glanced at Xiao Qu, who was hiding far away. At this time, he had finished repairing his face, and quickly waved his hand at him.
"I said, can you get closer? There is nothing to be afraid of the dead. If you are afraid of the living, come here quickly. Generally, in a hotel of this size, people from any department can know the cameras in a certain part of the hotel. hard to use?"
Xiao Qu moved closer, but still blocked the position of the dissecting table with his hands. The state of the deceased was horrific. He had just undergone facial image restoration, and he was already too irritated.
"Network administrators, monitoring room staff, high-level management, chefs, and people who have stolen things without being caught, these people must know that the monitoring below is not easy to use, but I took a look, and most of the spare parts in this warehouse are all kinds of dry goods. These things are also used during autumn and winter tonic, and it is true that the number of openings in summer and autumn is extremely small."
Zhou Ning nodded, approving Xiaoqu's analysis.
"In this way, there are quite a few people who know about it, especially the key to the spare parts warehouse, which is hung on the message board. It can be said that it is shining brightly. I know, but what was in this freezer originally? Is it empty?"
Zhu Xingxing shook his head.
"When we opened the freezer, the body was covered with a layer of heat-insulating film, like a silver thing used for camping. There were six or seven plastic boxes on it. There were things like fritillaria and Chuanqiong. It is cooked one can after another, and it seems to be a semi-finished product for making medicinal food."
Zhou Ning suddenly realized.
"This is a careful search. Even if the key is not replaced, no one will notice that there are more things in it in a short time."
Zhu Xingxing coughed.
"When the head chef heard that the body was found here, he was so scared that he peed his pants, and then went to the kitchen to vomit. I guess he stole the food here before. The team is busy with the interrogation. Let's start now. Anatomy?"
Zhou Ning glanced at Xiao Qu who was covering his face with one hand, shook his head and waved his hands and said:
"The comparison is over, are you sure this person is Liu Meiling?"
Xiao Qu quickly nodded.
"After comparison, the deceased is indeed Liu Meiling."
Zhou Ning changed a pair of gloves and waved at Zhu Xingxing and others.
"Then let's start the autopsy. Zhu Xingxing will explain, Da Zhao will turn on the recording equipment, Sun Gaotie and the rest of you will watch from the head of the deceased."
Da Zhao turned on the recording device, then held up the camera, and followed Zhou Ning. Zhu Xingxing began to explain the general situation. Her memory was beyond the reach of those few, and all of them showed envious eyes.
After the introduction, Zhou Ning did not rush to move the knife, but took a probe to measure the depth of all the wounds on the deceased's face. Zhu Xing Xing helped measure the length of the probe.
All the wounds on the face, except the starting point, all the cuts are directly into the bone, and the wound is not smooth, it is the kind of a meal.
Of course, the same inspection was done on the pubic symphysis. After seeing these two places, Zhou Ning put away the probe, gestured at the position of the pinch mark again, and waved towards several people.
"Come here, turn the corpse over and display it in a prone position. Sun Gaotie will pluck the hair of the deceased."
Hearing that he had his own task, Sun Gaotie hurried forward, tidied up the hair of the deceased, tied it at the end, and then began to quickly swing the razor, which was either an electric clipper or a razor. Clippers tidy up leftover hair stubble.
Zhou Ning squatted down slightly, and a lamp illuminated the wound on the occipital of the deceased. The wound was triangular in shape, and the boundary was not clear. It was obviously the damage caused by being pushed down and smashed on a corner of the freezer. broken bones.
Zhou Ning only glanced at the nearby film. Conditions are limited, and the entire skull cannot be scanned here. The clarity on the film is not high. The deceased's occiput is a depressed fracture, but this is not a fatal injury.
Zhu Xingxing came over and glanced at the corpse.
"Boss, do you need to adjust the direction of the corpse?"
Zhou Ning raised his hand to stop Zhu Xingxing's words.
"Liu Meiling and the murderer came to the basement together. Unprepared, they were strangled by the neck and pushed hard. Unprepared, the deceased fell backwards. Liu Meiling directly hit the back of the occipital. This impact caused a depressed fracture of the occipital skull. But not fatal, a brief coma made her unconscious.
As for the murderer throwing the deceased into the emptied freezer and venting his abuse, the pain caused the deceased to wake up from a coma, and the murderer might mention what happened back then. On the basis of Shi Yun. "
Zhu Xingxing didn't understand, but Da Zhao understood. It was indeed the first time in 15 years. When taking revenge, it is natural to let the other party know all this. Otherwise, this revenge is not a revenge for loneliness.
Da Zhao signaled, paused the recording equipment, and then said:
"You suspect that the murderer is Shi Yun. I have no objection to this, but based on the time when Liu Meiling disappeared, it was 7:14 at that time, which was the time of the buffet. There were many people going up and down in the kitchen. How could it be?" Did no one hear the sound?"
"That's a good question. I need to check with the hotel. Is the kitchen for the first buffet breakfast also in the basement? I think the previous photos show that this is a kitchen for pure Chinese food. Generally, breakfast is prepared separately in the restaurant. After all, It's something like simple porridge.
Second, on the morning of August 8, whether the kitchen of the Blue Ocean Hotel was working normally, I always felt that the murderer seemed to have calculated everything, including the time of check-in, the location of the attack, the location of the body, and even the time when the body was found, as well as our investigation. In the process of her identity, she told the team and checked with the hotel about breakfast. "
Da Zhao glanced at Sun Gaotie, he nodded quickly, took off his gloves, and ran out to contact with his mobile phone. Just as Da Zhao was about to turn on the recording device, Zhou Ning stared at the dead man's waist.
Zhu Xingxing also came over, Da Zhao pushed Zhu Xingxing, raised the moving light source just now, and illuminated the position Zhou Ning was staring at, a faint pinhole appeared on the waist of the deceased.
Zhou Ning took a closer look at this position. It happened to be between the second and third lumbar vertebrae. This is a commonly used position for spinal anesthesia. Most people can't distinguish it. But thinking that Shi Yun's mother and grandfather are both doctors, Zhou Ning suddenly felt that there might be a family. factor.
"No wonder I felt weird when I saw the traces left in the freezer, and the nails of the deceased had been scratched off. Thinking about it now, the murderer gave Liu Meiling anesthesia, so she didn't feel anything in her lower body.
Liu Meiling woke up from the pain of the cut on her face. After hearing everything the murderer said, she wanted to climb out, but the freezer was closed. Scratching, struggling, cold, and blood loss were all fatal. "
Zhou Ning straightened up and waved his hands. Everyone put the deceased's body in a supine position before continuing.
"Okay, turn on the recording equipment, and we will begin the formal dissection."
Zhou Ning has come to the Criminal Technology Center of the Public Security Bureau of Southern Henan Province, where Zhu Xingxing has borrowed the dissection room from the director of the center under the banner of Zhou Ning. Zhou Ning was surprised by this ability.
The conditions inside are quite good, and there is a transparent patio above the head. Obviously, this is the kind of dissection room that can carry out teaching work.
The corpse was placed on the dissecting table, after thawing, and the freezer was placed next to it. Zhou Ning couldn't help but hold his forehead, and he couldn't boast. He brought this thing back with him, which Zhou Ning didn't expect.
"Did you take a picture of the scene?"
Zhu Xingxing nodded, found the photo himself, and enlarged it on the display screen. Zhou Ning glanced at it. The spare parts warehouse is not small. There are three freezers on the left and right. Shelves, various plastic boxes, with product names on them.
As for the corner of the freezer with blood, it's on the left side of the door.
Zhou Ning nodded, and walked to the corpse. The corpse had already thawed out, but the black dress was not taken off, and it was all pasted on the corpse.
The cuts on the face looked more severe than in the video, especially after thawing, the blood flowed out, and the bones could be seen deep, but the skin of the wound did not curl up, and the wound above the pubic symphysis was the same, and the finger marks on the neck were very clear.
Zhou Ning stretched out his hand for comparison. It was smaller and shorter than his hand, and his fingers were more slender.
"Have you collected DNA yet?"
Zhu Xingxing nodded and found a list.
"I collected a large number of fingerprints and DNA from the deceased's body surface, mouth, vagina, nails, nasal cavity, inside and outside of the freezer, vehicle, inside and outside of the spare room door, as well as the ground and the freezer with a positive luminol reaction.
Of course, the head chef, all the staff in the back kitchen, the lobby manager, etc., and the internal staff of the Blue Ocean Hotel, I also collected fingerprints and DNA.
There were 11 people who left fingerprints and DNA, and 8 fuzzy fingerprints could not be distinguished. I think it is too old to be ignored. However, a female DNA was found on the neck of the deceased and in the extract of the facial wound of the deceased.
The hair found on Liu Meiling's vehicle, as well as the extracts from the steering wheel, were compared with those of the deceased. Sister Cui just sent the DNA of Liu Meiling's parents. The comparison results showed that Liu Meiling's parents were the biological parents of the deceased. "
Zhou Ning paused and gave Zhu Xingxing a thumbs up. Without the large-scale sample collection before, the possibility of finding DNA is very low.
"It's amazing. You can make such a discovery on the second day after you come here, which shows that you are very careful in your work."
Da Zhao curled his lips, wanting to say a blow, but before he could move, he found his foot was being stepped on by Zhou Ning, Da Zhao quickly shut up, Zhu Xingxing shook his head happily, a little embarrassed.
"Actually, the square team has searched almost the entire perimeter. When I came, I told the leader's opinion. He thought it made sense, so he began to search overnight, mainly searching the interior of the hotel. Only then did he find the spare parts warehouse in the early morning. The problem, the hotel was also very shocked.
The head chef said that he came here to work a year ago. This spare parts warehouse is basically only entered once during the inventory, and no one usually enters. Because of the design, the basement here is not connected to monitoring, but the camera is hung. That's right, many people don't know that the thing is not connected to the Internet. "
Da Zhao's eyes widened, and he glanced at Xiao Qu, who was hiding far away. At this time, he had finished repairing his face, and quickly waved his hand at him.
"I said, can you get closer? There is nothing to be afraid of the dead. If you are afraid of the living, come here quickly. Generally, in a hotel of this size, people from any department can know the cameras in a certain part of the hotel. hard to use?"
Xiao Qu moved closer, but still blocked the position of the dissecting table with his hands. The state of the deceased was horrific. He had just undergone facial image restoration, and he was already too irritated.
"Network administrators, monitoring room staff, high-level management, chefs, and people who have stolen things without being caught, these people must know that the monitoring below is not easy to use, but I took a look, and most of the spare parts in this warehouse are all kinds of dry goods. These things are also used during autumn and winter tonic, and it is true that the number of openings in summer and autumn is extremely small."
Zhou Ning nodded, approving Xiaoqu's analysis.
"In this way, there are quite a few people who know about it, especially the key to the spare parts warehouse, which is hung on the message board. It can be said that it is shining brightly. I know, but what was in this freezer originally? Is it empty?"
Zhu Xingxing shook his head.
"When we opened the freezer, the body was covered with a layer of heat-insulating film, like a silver thing used for camping. There were six or seven plastic boxes on it. There were things like fritillaria and Chuanqiong. It is cooked one can after another, and it seems to be a semi-finished product for making medicinal food."
Zhou Ning suddenly realized.
"This is a careful search. Even if the key is not replaced, no one will notice that there are more things in it in a short time."
Zhu Xingxing coughed.
"When the head chef heard that the body was found here, he was so scared that he peed his pants, and then went to the kitchen to vomit. I guess he stole the food here before. The team is busy with the interrogation. Let's start now. Anatomy?"
Zhou Ning glanced at Xiao Qu who was covering his face with one hand, shook his head and waved his hands and said:
"The comparison is over, are you sure this person is Liu Meiling?"
Xiao Qu quickly nodded.
"After comparison, the deceased is indeed Liu Meiling."
Zhou Ning changed a pair of gloves and waved at Zhu Xingxing and others.
"Then let's start the autopsy. Zhu Xingxing will explain, Da Zhao will turn on the recording equipment, Sun Gaotie and the rest of you will watch from the head of the deceased."
Da Zhao turned on the recording device, then held up the camera, and followed Zhou Ning. Zhu Xingxing began to explain the general situation. Her memory was beyond the reach of those few, and all of them showed envious eyes.
After the introduction, Zhou Ning did not rush to move the knife, but took a probe to measure the depth of all the wounds on the deceased's face. Zhu Xing Xing helped measure the length of the probe.
All the wounds on the face, except the starting point, all the cuts are directly into the bone, and the wound is not smooth, it is the kind of a meal.
Of course, the same inspection was done on the pubic symphysis. After seeing these two places, Zhou Ning put away the probe, gestured at the position of the pinch mark again, and waved towards several people.
"Come here, turn the corpse over and display it in a prone position. Sun Gaotie will pluck the hair of the deceased."
Hearing that he had his own task, Sun Gaotie hurried forward, tidied up the hair of the deceased, tied it at the end, and then began to quickly swing the razor, which was either an electric clipper or a razor. Clippers tidy up leftover hair stubble.
Zhou Ning squatted down slightly, and a lamp illuminated the wound on the occipital of the deceased. The wound was triangular in shape, and the boundary was not clear. It was obviously the damage caused by being pushed down and smashed on a corner of the freezer. broken bones.
Zhou Ning only glanced at the nearby film. Conditions are limited, and the entire skull cannot be scanned here. The clarity on the film is not high. The deceased's occiput is a depressed fracture, but this is not a fatal injury.
Zhu Xingxing came over and glanced at the corpse.
"Boss, do you need to adjust the direction of the corpse?"
Zhou Ning raised his hand to stop Zhu Xingxing's words.
"Liu Meiling and the murderer came to the basement together. Unprepared, they were strangled by the neck and pushed hard. Unprepared, the deceased fell backwards. Liu Meiling directly hit the back of the occipital. This impact caused a depressed fracture of the occipital skull. But not fatal, a brief coma made her unconscious.
As for the murderer throwing the deceased into the emptied freezer and venting his abuse, the pain caused the deceased to wake up from a coma, and the murderer might mention what happened back then. On the basis of Shi Yun. "
Zhu Xingxing didn't understand, but Da Zhao understood. It was indeed the first time in 15 years. When taking revenge, it is natural to let the other party know all this. Otherwise, this revenge is not a revenge for loneliness.
Da Zhao signaled, paused the recording equipment, and then said:
"You suspect that the murderer is Shi Yun. I have no objection to this, but based on the time when Liu Meiling disappeared, it was 7:14 at that time, which was the time of the buffet. There were many people going up and down in the kitchen. How could it be?" Did no one hear the sound?"
"That's a good question. I need to check with the hotel. Is the kitchen for the first buffet breakfast also in the basement? I think the previous photos show that this is a kitchen for pure Chinese food. Generally, breakfast is prepared separately in the restaurant. After all, It's something like simple porridge.
Second, on the morning of August 8, whether the kitchen of the Blue Ocean Hotel was working normally, I always felt that the murderer seemed to have calculated everything, including the time of check-in, the location of the attack, the location of the body, and even the time when the body was found, as well as our investigation. In the process of her identity, she told the team and checked with the hotel about breakfast. "
Da Zhao glanced at Sun Gaotie, he nodded quickly, took off his gloves, and ran out to contact with his mobile phone. Just as Da Zhao was about to turn on the recording device, Zhou Ning stared at the dead man's waist.
Zhu Xingxing also came over, Da Zhao pushed Zhu Xingxing, raised the moving light source just now, and illuminated the position Zhou Ning was staring at, a faint pinhole appeared on the waist of the deceased.
Zhou Ning took a closer look at this position. It happened to be between the second and third lumbar vertebrae. This is a commonly used position for spinal anesthesia. Most people can't distinguish it. But thinking that Shi Yun's mother and grandfather are both doctors, Zhou Ning suddenly felt that there might be a family. factor.
"No wonder I felt weird when I saw the traces left in the freezer, and the nails of the deceased had been scratched off. Thinking about it now, the murderer gave Liu Meiling anesthesia, so she didn't feel anything in her lower body.
Liu Meiling woke up from the pain of the cut on her face. After hearing everything the murderer said, she wanted to climb out, but the freezer was closed. Scratching, struggling, cold, and blood loss were all fatal. "
Zhou Ning straightened up and waved his hands. Everyone put the deceased's body in a supine position before continuing.
"Okay, turn on the recording equipment, and we will begin the formal dissection."
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