novice forensic medicine

Chapter 195 During the Test

Xu Dayuan nodded.

"From Xing Xiaoli, I feel that everyone in the figure skating team seems to be suspicious, especially Wang Ying, who keeps talking about Miss Li.

But what happened is not polite at all. Now everyone is detained on the third floor of the gymnasium. I want to meet with you, and then go back and talk to them separately. "

Zhou Ning put down the whiteboard marker, nodded slightly and said:
"We'll study the skeleton later."

After receiving Zhou Ning's affirmative answer, Xu Dayuan shook his phone.

"Sure, then I won't bother you here, there are still a lot of things over there, if you have any news, please tell me immediately."

After sending Xu Dayuan away, Zhou Ning came directly to the laboratory. After all, the bones of the deceased were placed here. Xia Momo heard the door open and saw Zhou Ning and Liu Yongxin coming in.

"Xu Da left?"

"Well, have you scanned the cervical spine section and hand and foot sections?"

Momo Xia nodded and turned on the big screen.

A huge picture appeared. The whole picture was a section of the cervical spine. The horizontal traces on it were very obvious, and even some bone defects could be seen.

"That's too clear."

Liu Yongxin sighed in surprise, after all he didn't understand these new household items.

"This is a high-definition camera just installed. It can take pictures under the microscope. Many details can be observed more carefully. Zhou Ning asked me to contact Dr. Lu to borrow it."

Liu Yongxin looked at Zhou Ning who was staring at the picture. Obviously, he, a good apprentice, had a plan in mind, but what can he find in the cross-section?
"Do you want to judge whether the murderer is left-handed or right-handed?"

Zhou Ning nodded.

"Well, I have always had a suspicion that the murderer is somewhat familiar, but you asked me to say it, but I can't tell, so I want to see the details of the section, whether it is the proficiency of cutting, or the application of the left and right hands, take a look Can you find some hidden information.

You saw the hand saw that I brought back from the first scene. It’s very common. It’s not like a chainsaw. You can buy it in any hardware store or supermarket. I asked Da Zhao to buy pork legs, pork necks and hand saws. , we will do experiments in a while, and then compare them. "

Liu Yongxin leaned over and stared at the screen carefully like Zhou Ning. The texture of the cutting surface had a strong sense of direction. The position of the defect was probably the broken part of the saw blade, but the frequency of the splicing was still almost the same.

"Appears to be right-handed, very skilled and well balanced."

Zhou Ning nodded, Liu Yongxin's analysis was the same as he thought.

"Good physical strength, strong hand control ability, good at using tools, often watch CSI and other movies, have anti-reconnaissance ability, and know some methods to destroy blood DNA."

Liu Yongxin raised his eyebrows.

"According to this analysis, haven't Wang Ying and Zhuang Chunlan been ruled out of suspicion?"

At the same time, the door was opened, and Da Zhao heard his voice before seeing him.

"Hurry up and help me, I can't carry it anymore, hurry up, who will help lift the pig's head?" The three of them turned their heads together, the door had already been opened, and Da Zhao kicked on the door, pulling his neck and shouting.

But a few people, in their minds, are thinking about the word pig's head.

"Pig's head?"

"I said Zhou Xiaozhou, don't be dazed, come and help first, I can't let go, my sleeve is scratched on the code scanner!"

Several people walked over quickly and found a big pig's head behind Da Zhao. Xia Momo was startled. After all, the pig's trembling ears were still shaking. Zhou Ning glanced at it and found that it was not a pig's head, it was a pig's head at all. first half.

"how much did you spend?"

Da Zhao rolled his eyes.

"Zhou Xiaozhou, this is a matter of money, help me! Don't worry, I will ask Director Pang for reimbursement, and we won't let us bear the cost."

Hearing this, Zhou Ning hurriedly helped Da Zhao untie his sleeve.

Several people carried half a pig to the operating platform on the other side.

Yang Xuetong followed in with a bunch of tools, and was startled when he saw the pig.

"Isn't it just an experiment, isn't it a little too much to have half a pig?"

Da Zhao bared his teeth and smiled, wiped his hands clean, then put his waist in and said:
"Practice is the only criterion for testing the truth. We studied it for a long time, but we can't see anything. I made half a pig, and the strength of the bones is not the same, so I just got a first half."

Xia Momo glanced at it.

"What about the second half? They sold you like this?"

"Of course it's for sale. Now that it's done, let's try it out. Zhou Xiaozhou, you can choose it. Who will cut it?"

Zhou Ning looked at a few people, and his eyes fell on Yang Xuetong. After all, Xia Momo had to do software operations and related records, Zhu Xingxing hid back when he watched the pigs, Liu Yongxin was not physically strong, and Da Zhao was too energetic.

"Come on, Yang Zheji, listen to Teacher Xia's command, we will imitate the murderer's cutting action, and see if we can achieve such a neat cut and balanced strength."

Xia Momo calculated and drew a vertical line on the pig's foot.

"Cut according to the position I drew, but I need to collect some data, please wait a moment."

As he spoke, Xia Momo put a pressure pad under the pig's feet, connected it to the machine, and then clicked on the collector, making an OK gesture.

Yang Xuetong didn't talk nonsense, put on his gloves, raised his hand saw, and began to saw along the line Xia Momo had drawn.

After all, the dry mark test has been done for a long time, and it is okay to have a steady hand. The first time you go down, you will directly poke the saw blade on the pigskin. After a few strokes, you will reach the position of the bone. You can feel the increased resistance on your hand. Speed, and soon the front end of the pig's foot fell.

Zhou Ning held down the chronograph stopwatch and sawed off a pig's front foot, 4:43 minutes.

Picking up the fallen pig's foot and inspecting the section, not to mention that the surface is basically the same as the section of the deceased's tibia and fibula, they are all strip-shaped cross-sections with a sense of direction, which are fairly neat.

"continue!"

This time, several people placed the pig on the ground, Xia Momo put the pressure pad on it, Yang Xuetong knelt on one knee, controlled the direction of the hand saw with his leg, and began to saw it creakingly.

The cutting speed of the pork neck flesh was very fast. When it reached the position of the cervical spine, it froze a little. Sure enough, the saw blade broke, and the operation continued with a new one. It took a total of 10 minutes, of course, the time for changing the saw blade was included.

Yang Xuetong stood up, shaking his sore wrist.

"Is the team leader also sawing the other front pig's foot for comparison?"

Zhou Ning shook his head, Zhu Xingxing raised his hand.

"Team leader, why don't I try it out? I happen to be left-handed, so it's good to use it as a reference, to compare the time and strength?"

"it is good."

Zhou Ning nodded bluntly, Zhu Xingxing came over and began to imitate Yang Xuetong, pushing hard towards the front pig's feet, I don't know if he was watching all the time, so he also summed up Yang Xuetong's actions, she saw off the front pig's feet in only At 5:03, the speed was comparable to that of Yang Xuetong.

Zhou Ning paused the stopwatch and raised his head slightly.

"Based on this speed, the murderer spent about half an hour dissecting the body in the Enbo community. After killing the deceased, dismembering the body, packing it, and cleaning it, the time spent in the Enbo community should be at least an hour, and both men and women may be involved. "

Several people nodded, but Xia Momo spoke now.

What she calculates on the computer has results.

"Comparing the data collected just now, Yang Xuetong and Zhu Xingxing are very different in strength, but the degree of completion is different. If you look at the detailed comparison picture, you can find that the lines on the cross section are different."

As he said that, Xia Momo put three pictures on the big screen. Below it was marked that the first one was the cross-section of the deceased's cervical spine, the second was the cross-section cut by Yang Xuetong, and the third was completed by Zhu Xingxing.

The first two surfaces are relatively uniform, the horizontal lines are clear, and the line spacing is almost the same, but the cross section cut by Zhu Xingxing is much rougher, the spacing varies, and even the depth of some places is inconsistent.

"The strength is not enough, that's why this happened. I think the murderer is stronger than Zhu Xingxing, and similar to Yang Xuetong."

Zhou Ning tore off his gloves, washed his hands, and then said slowly:

"It seems that the murderer is an adult male, right-handed. This way, Zhuang Chunlan and Wang Ying are less likely to be suspected. Let's wait for the test results after everything is done. Of course, there is also surveillance investigation. When will Xiaoqu come?"

January 2011, 10 7:7
Just as Zhou Ning entered the office, there was a shout from behind, and he looked back to see Da Zhao coming with a stack of inspection reports.

"Is the identity of the deceased confirmed?"

(End of this chapter)