novice forensic medicine

Chapter 275 Bow Pattern

Zhou Ning hurriedly held up the bag, walked under the LED light, observed carefully, and found that the blood fingerprint lines were not clear, and it looked similar to a blood drop.

No wonder Xu Guanhai didn't mention this blood fingerprint. He probably felt that there was no need to collect such a fingerprint that could not leave any lines.

However, upon careful observation, the lower half of the fingerprints were all horizontal lines, without ups and downs. This discovery made Zhou Ning's eyes brighten.

Although the upper part cannot be seen, it is enough to prove that the owner of this fingerprint has a high probability of a bow pattern.

"I suspect that the murderer has bow marks."

The people around all took a breath, and hurriedly came to look at it. Xia Momo and Xiao Qu looked at each other, looking a little dazed. Xia Momo looked at Zhou Ning and asked:

"Are people with bow-shaped patterns special?"

Zhou Ning nodded.

"Most people have spiral fingerprints or circular fingerprints, which are what we call buckets and dustpans. Only 5% of the world's people have bow-shaped fingerprints. The characteristics of these fingerprints are that the lines are curved from fingertips to knuckles. Gradually become smaller, until near the knuckles and parallel to the knuckle flexor line.

If a straight line is used to connect many arcs to form a protruding point as the central axis, depending on its inclination, three arc patterns can be divided into left, right and non-inclined.According to the height of the central arc line, it can be divided into three types of arc lines: low, medium, and high. "

Liu Yongxin waved his hand.

"It's too complicated for you to say that. To put it bluntly, arched lines are fingerprints with only slightly curved lines. It is difficult to see such fingerprints in daily situations. There are certain genetic factors, but not all families are like this."

Xia Momo and Xiaoqu subconsciously looked down at the fingers, as if they had never seen anyone with such fingerprints.

Zhou Ning narrowed his eyes, looked at Da Zhao, and then at the sky outside.

"Da Zhao called Director Xu. During the investigation tomorrow, all the people who are investigated will have their fingerprints collected, looking for those with bow-shaped patterns."

Xia Momo shook her neck, stayed up all night last night, and rushed to Rudong City as soon as possible, and even tossed with Zhou Ning all day to restore the sculpture of the dead man's head. At this time, her neck was sore, but look With such special fingerprints, she became interested.

"I've never seen such a fingerprint, or else I'll give it a whirl in the database."

Xiao Qu shook his head and leaned over, turned the computer in one direction, only to realize that this guy is even more impatient, he has already scanned the blood fingerprint, and he wants to look for it in the system, but it shows that the collection of fingerprint characteristics is not enough, do you want to continue? Fuzzy looking.

Seeing this sentence, Xia Momo also sighed.

Zhou Ning raised his eyebrows.

"What do you mean?"

Xiao Qu knew that although Zhou Ning participated in the design of the software, what he provided was directional and the combination of various acquisitions and applications. He was not clear about the details of these operations.

"That's right, if there are less than four feature points on a fingerprint, and the integrity of the fingerprint is less than 30%, then the result of this fuzzy search will be a very large amount of data.

It’s almost the same as not searching, just like this person suspects that it is a bow-shaped pattern, then the search may find people with bow-shaped patterns in Ludong Province or even the whole country. The data below you is the result of a fuzzy search. "

Although bow-shaped patterns are rare, accounting for about 5% of the world's population, it is really an astronomical figure to find out all people with bow-shaped patterns. Indeed, this screening is meaningless.

Zhou Ning suddenly realized, looking at the number pointed out by Xiaoqu, even if he knew that the murderer was inside, it was impossible to investigate it individually.

"Among the four members of the Xu family, is there anyone with a bow pattern?"

Xiao Qu tapped the keyboard and found the fingerprints of the four members of the Xu family, the fingerprints of Xu's parents and elder brother Xu Qing, all of them were normal fingerprints, but Xu Dan's fingerprints were only the fingerprints of the left and right thumbs and index fingers.

There is a note below, Xu Dan's right hand is broken, and the remaining three fingers, fingerprints are incomplete and cannot be recorded, hereby explain.

Xiao Qu quickly gave Zhou Ning a look, but Zhou Ning didn't say much. After all, such things happen occasionally, but usually they will be added later, unless the three fingers can't add fingerprints.

"Okay, then I won't search today. Hurry up and arrange a place for Mr. Xia to rest. Tomorrow, I will be assigned with the working group and follow all the groups to carry out the screening work."

Early the next morning.

Everyone was assigned, only Liu Yongxin and Da Zhao followed Zhou Ning, and drove towards Renjiazhuang Village together, traveling more than ten kilometers for more than half an hour.

When you come down from Provincial Highway 213, you will see Sunshou Town Middle School in the west of Luxi. Turn eastward and pass the intersection not far away, and you will come to the door of Xu's house.

Zhou Ning got out of the car and did not go in in a hurry, but circled around Xu's house.

It is a single-family house, and the left and right sides are not connected to the neighbors. There is a path on the left and right sides of the yard, and a ditch on the north side. There is a pig farm not far away, and some sounds can be heard here.

Liu Yongxin and Da Zhao followed Zhou Ning, without speaking or introducing, they walked to the main gate of Xu's house together.

On the left is a front room with the sign of Renjiazhuang Clinic, but the clinic is locked, and you can see several beds inside, as well as a dispensing room and a consultation room. You can see that the dispensing room is full of various medicines from the window. Drugs, though small, have all internal organs.

The courtyard in front of Xu’s house should have been overturned. In front of the original dilapidated main house, a small second floor was built, with a passage like a doorway underneath, so that there would be an extra courtyard at the back. The architectural methods of ordinary Ludong are very different, and it feels a bit like a second courtyard.

The left and right sides are the garage, and the other side is the kitchen and dining room. The dining room is very large. It seems that most of the family gatherings are here.

As for the attic, it was on the second floor of the dilapidated main house at the back.

After passing through the passage, you came to the courtyard behind. When you walk to this location, you can clearly smell a faint smell, but this smell is mixed with some sandalwood.

Zhou Ning turned his head and found that there was a huge incense burner behind the flipped second floor, with a lot of burnt incense butts densely inserted in it, and the incense ash inside was very thick. Some sandalwood.

This effect is not bad. It has been so many days since the report on February 2, and there is still such a heavy sandalwood fragrance in the backyard, which is probably smoked out.

Da Zhao walked to Zhou Ning's side, pointed to the door of the main house and said.

"Just go through this gate on the first and second floors. To go to the attic, you have to go from the side. There is a separate wooden staircase over there."

Following Da Zhao, he climbed up the wooden stairs. The higher he went, the stronger the smell became. Da Zhao held up the flashlight on his mobile phone, shone it, and then turned on a switch, instantly lighting up the dim attic.

The sundries inside have been cleared out, and there are some circles and frames drawn on the ground. After Da Zhao introduced it, Zhou Ning kept nodding and followed him to the window.

The wooden boards on the ground here are already black and purple, and there are still maggot shells around them. Around the circle on the ground, the maggot shells are also arranged in a ring shape. Da Zhao squatted down close and let the light on to introduce:
"The number of maggot shells is very large. I think it is because the corpses are packed in bags with clothes underneath, so the space for flies to enter is a bit small. When flies gnaw and rot, a large amount of putrefaction liquid is produced. Extended the decomposition time of flies.

If it is summer, it will last at least 20 days before being eaten clean, and if it is spring and autumn, it will be at least 30-40 days. "

Zhou Ning glanced at the marks on the ground, opened his eyes slightly and said:
"I feel that in late spring and early summer, or in late summer and early autumn, the temperature should have just cooled down on the day of the deceased's death. Although the suit on his body was made of wool, I always felt that the clothes were not his. After all, wearing such a suit at this age seemed a bit It’s so old-fashioned, and I think it’s done to look formal.”

Big Zhao was taken aback.

"When Zhou Xiaozhou was in the office, why didn't you say so many judgments? Did you already have some direction?"

Zhou Ning nodded.

"There are too many people in the office, and forensic doctor Xu is getting old, so it's not convenient for me to say many things directly."

Liu Yongxin understands that his apprentice is giving him face. Although this Xu Guanhai works very hard, but his ability is mediocre, and he always lives on his laurels. He is different from Liu Yongxin. After all, Liu Yongxin can handle all the things in Qidong by himself.

"It's nothing to lose face, next time you have an idea to speak up, you suspect the Xu family, right?"

Zhou Ning nodded.

"Although the old man of the Xu family used to live in this house, I always feel that this matter has something to do with their family, but I don't know why, this person was killed, why didn't they dispose of the body? Don't you care about the smell? Son?"

Zhao Xinli was in a hurry, and stomped his feet in front of Zhou Ning.

"Don't skip, I didn't understand before, you and uncle started to talk about the next step, there are only three people here, are you excluding me? It's too much!"

Zhou Ning smiled, Da Zhao always has a way, so that people can't ignore him, and they don't make people disgusted.

"Last night, Xiao Qu found that three of Xu Dan's fingerprints could not be entered. I think it's too coincidental. After all, the body was found in Xu's house. Everyone in Xu's family is suspected. Not to mention that they are criminal suspects. At least this may be the first place. It was a scene, so I decided to come over and take a closer look.”

Da Zhao suddenly realized.

"I didn't pay attention at the time. Didn't it say that her right hand was broken and she couldn't collect fingerprints. Could it be that there was no follow-up?"

Zhou Ning shook his head.

"No hurry, let's take a look at the scene first. Anyway, Bureau Xu sent someone to collect fingerprints at Xu Dan's place. The most important thing now is to find the first scene. Although the attic is used to hide corpses, the deceased may not be killed here." kill.

There are diazepam and lidocaine in his body. It is not easy for an adult man, even if he is not heavy, to bring a large living person to the attic in a coma. Perhaps the first scene is in the attic. Xu family. "

Liu Yongxin nodded and waved towards Da Zhao.

"There is no way to check the identity of the deceased. We can only start from here. You should quickly ask the people in the village committee downstairs when the house in front of the Xu family was built."

(End of this chapter)