Trace Inspection and Graphic Investigation belong to the same technical brigade, and are both on the second floor. However, they are separated by physical evidence and many other small departments, laboratories, etc., and are quite far apart. It took the two of them a while to reach them.

When they walked into the department, what they saw was similar to that of a picture detective. All the trace examiners looked sluggish, their eyes were sunken, and they looked very tired.

Brother Song looked around, said "Hey", then grabbed the famous mark inspector and asked: "Brother, where is Director Chai?"

"Ah, Brother Song." He said hello and then said: "Sister Chai went to the genetics laboratory to get the report and will be back soon. Well, please wait for a while, we have made a big discovery."

"Oh?" Brother Song suddenly became interested and asked quickly: "What's the big discovery?"

"That's right," he explained: "Sister Chai didn't come back with us last night. She stayed at the scene to continue investigating the traces. She mainly wanted to see if she could see any fingerprints."

"Fingerprints?" Qi Yuan couldn't help but wonder: "There are so many people coming and going in the convenience store. It is inevitable for customers to leave fingerprints when choosing things. I'm afraid there are too many to count."

"Normally speaking, yes," he shook his head and said, "But the counter area, especially the wine cabinet and cash register at the back, is different. Customers cannot enter that area."

Then he added: "Brother, you are a bit unfamiliar. Are you new here?"

These words sounded so familiar. In addition to Brother Song, many police officers had asked about it last night. Qi Yuan was already used to it. He smiled, nodded and said, "Well, I just joined the job a few days ago, and I am still in the probationary stage.

My name is Qi Yuan, please give me some advice."

"My name is Liu Xun, just call me Lao Liu." He replied, then looked at Brother Song and said, "Sister Chai extracted a lot of fingerprints, but our identification found that they all belong to the deceased and the perpetrator.

You should wear gloves when doing this, there is no gain in this regard.

However, in addition to fingerprints, Sister Chai also found some hair strands on the ground and on the counter, many of which had hair follicles. The key is that the length, thickness and color of the hair are different from those of the deceased. It is likely that they were

Left behind by the perpetrator.

Therefore, when Sister Chai came back, she compared these hair strands with the hair of the deceased, and immediately sent them to the genetics laboratory for examination and identification. Just now, news came from there that the DNA map had been released, and Sister Chai was asked to go

Pick."

"Oh? The suspect's DNA map has been released? This is really a big breakthrough!" Brother Song's eyes lit up.

"Yes, a big breakthrough." As soon as he finished speaking, a sentence came from behind him: "It's not in vain that I stayed at the scene for most of the night and searched the scene inch by inch."

His voice was a little hoarse and he sounded tired.

Qi Yuan and Brother Song both turned around and looked at the door. They saw a smartly dressed policewoman with short hair leaning against the door frame, holding a stack of papers in her hands.

"Chai...Sister Chai?"

Qi Yuan actually recognized her. After being surprised, he hurried up to meet her: "You are also in the criminal investigation detachment?"

"Hey, Xiao Qi, I thought I made a mistake." Policewoman Qi Yuan said Sister Chai pursed her lips: "We haven't seen each other for more than ten years, and there have been quite a few changes."

Brother Song was a little confused: "You two know each other?"

"Yeah, I know you, my cousin." Sister Chai said with a smile: "When I was in high school, I had to go back to my hometown to go to school due to household registration issues, and I bothered them to take care of him for three years."

Qi Yuan smiled bitterly: "Sister Chai, why haven't you gone home these years?"

"I'm busy with work, I can't help it." She shook her head: "There is no holiday during the Chinese New Year. After you went to college, your whole family moved to Huayang. When I went back during the holiday, you were not at home, so it happened to be wrong. By the way, my aunt and I

Uncle, you didn’t misunderstand me, right?”

"No, I just missed you." Qi Yuan said quickly.

"That's good." Sister Chai nodded lightly and said, "Let's chat later and talk about business first. Song, has Team Su handed you over to take charge of this case?"

"Yeah." Brother Song nodded repeatedly.

"Then let me tell you directly." Sister Chai handed over the report sheet in her hand and said: "The suspect's DNA map has been released. The report says that he is a male and has a high genetic match with the victim. He may have

A certain kinship.

But the report also shows that they are not brothers, but may be cousins. It is quite complicated to identify, because although the degree of matching is high, the differences are also large. In terms of the laboratory conditions of our detachment, the identification value is not very great.

It has no judicial effect.

As far as the investigation itself is concerned, it can indeed give a direction, but after all, it is just a possibility. If you follow this direction, you may find nothing in the end.

If you think it is necessary, you can send someone to send the test materials to the Provincial Forensic Medicine Center. They use the latest identification methods and can identify cousin relationships with a very high accuracy. It also has judicial validity."

"No need." Brother Song glanced at the report sheet and said, "For now, we will focus on intensifying the investigation appropriately, focusing on the relatives of the deceased who are also in Yuqiao and are qualified to commit the crime.

However, the general direction remains unchanged, and the suspects are screened out first based on the motive for committing the crime and the screening conditions given by Xiao Qi.

Anyway, we already have the suspect’s DNA map in hand, and we’ll just do an identification when the time comes. There will definitely be no mistakes in the identity identification.”

"Well, that's the same reason." Sister Chai nodded lightly, and then looked at Qi Yuan in surprise: "But what's going on with the screening conditions Xiao Qi gave? If I calculated correctly, he should have graduated this year.

, you should still be in the probationary period right now, right?"

Brother Song chuckled: "Don't underestimate your cousin, he is very good."

"Well, it's okay." Sister Chai patted Qi Yuan's shoulder: "Keep up the good work."

Being praised like this in front of an acquaintance, Qi Yuan felt a little embarrassed and couldn't help but touch his nose and lowered his head.

When Brother Song saw it, he and Sister Chai looked at each other, then changed the topic and said, "However, I'm afraid it's impossible to convict based on hair alone. After all, they may be related, so it's not surprising that they can get into the thing on the counter."

"No," Sister Chai shook her head and said, "The hair is floating on the pool of blood, which means that the suspect dropped it at the scene after committing the crime. Otherwise, it should have been soaked in blood. Therefore, the DNA extracted from it

It is enough to serve as ironclad evidence.

In addition, there are other clues, such as I found a fresh footprint in the window next to the back door, and the footprint was not bloody, and there was no reaction when the luminol reagent was sprayed..."

Having said this, she paused and looked at Qi Yuan: "Xiao Qi, do you know what this means?"

Qi Yuan was stunned. He didn't expect that she would suddenly test him, but he reacted quickly. After thinking about it, he said: "Did he escape through the window?"

"Nonsense!" She rolled her eyes: "Although it's doubtful that you have to climb through the window if you don't go astray, but that's not the point.
Chapter completed!