deep white secret

Chapter 99 I'm looking for my sister
"Let's talk about fingerprints first. There were more than ten obvious fingerprints left at the scene. Excluding Hu Siyang, the emergency doctor, there are currently three fingerprints that have not been found."

"Three?"

"According to the opinion of the Korean forensic doctor, at least three people came to Xu Dan's house that afternoon."

"But that's wrong. I didn't find any record of Xu Dan's visit at the community security office."

Zhang Lei was the first to object.Ma Mingjie also didn’t understand:
"All three people are suspects?"

Ningxia shook her head:
"We need to investigate this. Let's talk about the footprints."

Ningxia projects a photo of footprints onto a big screen:

"This footprint left a relatively complete imprint in the north bedroom. Based on the direction and size of the footprint, Korean forensic doctors speculated that it was a girl, about 1.6 meters tall, and under 20 years old."

Xu Jie recorded this clue thoughtfully.

"Everyone look here again."

Ningxia pointed to Xu Dan's photo:
"On Xu Dan's side, with his toes facing the direction of Xu Dan's body, there are also a pair of obvious footprints. The footprints are of different depths, with the forefoot being deeper."

"Captain Xu, what does this mean?"

When Shi Yihang spoke, Ningxia also had this question.

"Ningxia, what do you think?"

Being called out by Xu Jie again, Ningxia felt a little guilty. She was really not sure about this:

"The owner of the footprints is lame?"

Ning Xia answered bravely, Xu Jie shook his head and explained to her and Shi Yihang:

"No, you can see that the footprints are on Xu Dan's chest, which means that this person squatted down and stayed there for a few minutes or longer."

"Is it the murderer?"

Ningxia understands:
"Could it be that the murderer squatted down to check on Xu Dan's physical condition?"

Xu Jie denied:

"Look at the drag mark next to Xu Dan's body. If the murderer was squatting next to Xu Dan, why didn't Xu Dan move?"

This confused Ning Xia and Shi Yihang, and Xu Jie continued:
"There are many scars on Xu Dan's body. They should have been left before she fell to the ground. In this case, there is no need for the murderer to stay by Xu Dan's side for so long."

"Then what's going on with these footprints?"

Ningxia asked something that everyone was curious about.

"I suspect it's the third person."

"The third person?"

"Forensic doctor Han said that three people entered Xu Dan's house that day, so let's consider the murderer as No. [-] and the girl as No. [-]. Now what about this person? He is No. [-]."

Shi Yihang is mainly responsible for technical work in the criminal investigation team. On-site trace investigation is his weakness, so Shi Yihang raised his question:
"Team Xu, fellow criminal investigation experts, I don't understand. Nowadays, every house has floors, and the kitchen is usually made of ceramic tiles. You also change your shoes when you go home. How did you find this footprint when it's not outdoors?"

Xu Jie smiled and pointed at Ningxia:
"Ningxia, tell me."

"Needless to say outdoors, the texture of the shoe path, weight, and the point of focus on the soles of the feet when walking can all infer the general characteristics of a person. If it is indoors, of course it will be more obvious without shoes."

Ningxia looked at Shi Yihang and was still confused, and continued:
"Big feet wear small shoes, and small feet wear big shoes. When barefoot, sweat will stick to the floor. These are all characteristics. Specifically, Shi Yihang should go to Han forensic doctor to learn."

"What about this case? How did the forensic doctors find differences among the many footprints?"

"Xu Dan has a small family. Usually there are only Hu Siyang and Xu Dan. It is easy to distinguish them from the messy footprints. As for the other three people."

Ningxia projected the footprints on Xu Dan's side on the big screen:

"You see there is flour and butter next to the footprints. Xu Dan scattered these two things on the ground when he fell to the ground. We can't see it with the naked eye, but the traces are very clear after identification."

Ningxia looked at Xu Jie:

"If so, I agree with Team Xu's analysis. This footprint should belong to a third person."

After this analysis, Ma Mingjie and Zhang Lei also agreed with this opinion. Zhang Lei opened the autopsy report in front of him and said:
"Captain Xu, there is also this clearest fingerprint. I suspect it was also left by a third person, and the third person is a woman."

"The one at the entrance door? Tell me."

"Yes, based on Xu Dan's injury location and the angle of the murder weapon, the forensic doctor speculated that the murderer was a male, about 180cm tall, tall and weighing between 160 and 170 kilograms, and this fingerprint confirmed that he was a female."

Xu Jie smiled and asked:

"Don't forget, our number two has been confirmed to be a girl, why wasn't she left behind?"

Zhang Lei hesitated and asked with a smile:
"I'd say it's a feeling. What does Captain Xu think?"

Zhang Lei continued:
"The footprints left by the girl at the scene are relatively clear, and the distance between feet is relatively consistent. I think it is more calm at Xu Dan's house. However, the fingerprint at the door has a thumb piercing outward. It is obvious that she accidentally grabbed the door frame when leaving. This needs to be looked at. We will analyze it after the scene.”

Ning Xia thought about it along Zhang Lei's train of thought:
"Team Xu, Officer Zhang's analysis makes sense. Xu Dan's apartment has the same structure as mine. The door opens on the left, but this fingerprint is on the right side of the door, which is a bit unreasonable."

Xu Jie stood up and walked to the door of the conference room. Ning Xia and Zhang Lei both understood.

The door of the criminal investigation team's conference room has the same structure as Xu Dan's house. Xu Jie looked at the forensic report and simulated the scene:

"In this case, the complete fingerprint should be left after the door is completely opened."

Xu Jie pointed to the big screen and put his right hand on the door frame:

"You see, only in this case can complete fingerprints be left. But whose door would be opened to this extent?"

Ningxia agrees with Xu Jie's conclusion. The door of Xu Dan's house must be opened at least as far as Ningxia's house in order to completely print his thumb on the door frame.

"Captain Xu, if we give this fingerprint to suspect No. 3, it can actually be established."

Ningxia stood up after speaking:
"Looking at the Korean forensic doctor's report, suspect No. 3 left few traces in the room, around the deceased, and on the door frame. If the door must be so big, will the suspect discover that Xu Dan has been killed?"

Ningxia walked to Xu Jie:

"I came in from the outside, and the moment I opened the door, I found Xu Dan lying on the ground. Then I ran over to confirm that she was dead. I was so scared that I left."

Ningxia holds the door with its right hand:

"During this period, the door was kept open. When I walked to the door, I left a fingerprint because I was in a panic. Is this reasonable?"

"Reasonable!"

Shi Yihang first agreed:
"That's absolutely the case. Ningxia's analysis is correct."

Xu Jie thought for a moment and agreed with Ning Xia's inference. His eyes were full of meaning, and Xu Jie said:
"Next, we will investigate in this direction. Xu Dan's interpersonal relationships need to be expanded. Officer Zhang will follow this line."

As soon as Xu Jie finished speaking, there was a knock on the door, and then Zhang Sidi looked into the conference room.

Zhang Lei was very surprised and walked over quickly when he saw this:

"What's wrong? Why are you here?"

Zhang Sidi raised his head, not wanting to talk to Zhang Ledo.

"I am busy."

"what's up?"

Zhang Sidi looked past Zhang Lei and towards Ningxia:
"Sister Ningxia, I'm looking for you."

Zhang Lei didn't understand:

"Ning Xia is at work, tell me if you have anything to say."

"No, I'm looking for my sister."

Zhang Lei was a little angry, Ning Xia quickly walked over:

"Officer Zhang is busy. Sidi and I have something to discuss in private."

Zhang Lei didn't believe it and felt helpless.

Seeing this, Xu Jie signaled everyone to end the meeting. When walking out of the conference room, Xu Jie saw a girl next to Zhang Sidi...

(End of this chapter)