The trace inspection and the graphic investigation belong to the same technical brigade, and they are both on the second floor, but there are physical evidence and many other small departments and laboratories in the middle, and they are quite far apart, and the two of them walked for a while before they arrived.

Walking into the department, the situation they saw was similar to that of the graphic detectives, and the trace examiners looked depressed, their eye sockets were deep, and they looked very tired.

Brother Song glanced left and right, hey, then grabbed the famous mark inspector and asked, "Brother, where is Director Chai?" ”

"Ah, Brother Song." He said hello and followed, "Sister Chai, she went to the genetics laboratory to get the report and will be back soon." Well, you guys wait a minute, there's a big discovery. ”

"Oh?" Brother Song became interested all of a sudden, and hurriedly asked, "What is the big discovery?" ”

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

"Fingerprints?" Qi Yuan couldn't help but wonder: "Convenience stores are full of people, there are too many fingerprints, and customers will inevitably leave fingerprints when they choose things, I'm afraid I can't count them." ”

"Normally yes," he shook his head, "but the counter, especially the wine cabinet and cash register at the back, is different, and customers can't get in." ”

Then he said, "Brother is a little blind, new here?" ”

This sounds too familiar, in addition to Brother Song, many policemen have asked last night, Qi Yuan is also used to it, smiled, nodded and said, "Well, I just joined the company a few days ago, and now I am still in the probationary stage." My name is Qi Yuan, and I have a lot of advice. ”

"My name is Liu Xun, call me Lao Liu." He replied, then looked at Brother Song again, and said: "Sister Chai extracted a lot of fingerprints, but we found that they were all deceased, and the perpetrator should have worn gloves when committing the crime, and there was no gain in this regard."

However, in addition to fingerprints, Sister Chai also found some hair strands on the ground and on the counter, several of which had hair follicles. The point is that the length, thickness and color of the hair are different from those of the deceased, and it is likely that the perpetrator left them.

Therefore, Sister Chai came back, compared these strands with the hair of the deceased, and sent them to the genetics laboratory for testing and identification as soon as possible. ”

"Oh? Is the suspect's DNA map out? This is a big breakthrough! Brother Song's eyes lit up.

"Yes, big breakthrough," as soon as his voice fell, 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." ”

The voice was a little hoarse, and it sounded tired.

Qi Yuan and Brother Song turned around in unison, looked at the door, and saw a well-dressed short-haired policewoman leaning against the door frame, holding a stack of papers in her hands.

"Firewood...... Sister Chai? ”

Qi Yuan actually recognized her, and after being surprised, he hurriedly greeted her: "You are actually in the criminal investigation detachment?" ”

"Yo, Xiao Qi, I thought I was wrong." The policewoman, Sister Chai in Qi Yuan's mouth, pursed her lips: "I haven't seen you for more than ten years, and the changes are not small." ”

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

"Uh-huh, yes, my cousin." Sister Chai smiled: "When I was in high school, I had to go back to my hometown to go to school because of household registration problems, and I bothered them to take care of them for three years. ”

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

"I'm busy at work, I can't help it." She shook her head: "There was no holiday during the Chinese New Year, and after you went to college, the family moved to Huayang, and you were not at home when I went back with a holiday, just staggered." By the way, my aunt and uncle didn't misunderstand me, right? ”

"That's not it, it's just that I miss you." Qi Yuan hurriedly said.

"That's good." Sister Chai bowed her head lightly and said, "Let's go back and say hello again, let's get down to business first." Song, this case, the Su team handed you over? ”

"Hmm." Brother Song nodded repeatedly.

"Then I'll just tell you." Sister Chai handed over the report sheet in her hand and said: "The suspect's DNA map has come out, and the report says that he is male, and the genetic consistency with the victim is quite high, and he may have a certain kinship."

But the report also shows that they are not siblings, they may be cousins, and the identification is quite complicated, because although the degree of agreement is high, the difference is also large, and in terms of the laboratory conditions of our detachment, the identification value is not very large, and it does not have judicial effect.

As far as the investigation itself is concerned, it can indeed give a direction, but after all, it is only a possibility, and if you want to investigate in this direction, you may find nothing in the end.

If you feel that it is necessary, you can send someone to send the sample to the provincial forensic center, where the latest identification method is adopted, and the cousin relationship can also be identified, and the accuracy rate is quite high. It also has the force of justice. ”

"No need." Brother Song glanced at the report sheet and said: "At present, it is necessary to appropriately tilt the investigation intensity, focusing on the relatives of the deceased who are also in Yuqiao and have the conditions to commit the crime.

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

Anyway, we already have the DNA map of the suspect in our hands, and we will do an identification when the time comes. You can't go wrong with identity testing. ”

"Well, that's the same thing." Sister Chai nodded slightly, and then looked at Qi Yuan in surprise: "However, what is the screening condition given by Xiao Qi?" If I'm not mistaken, he should only graduate this year, and he should still be in the apprenticeship at this time, right? ”

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

"Yes, yes, yes." Sister Chai patted Qi Yuan on the shoulder: "Keep coming on." ”

Being praised like this in front of acquaintances, Qi Yuan was a little embarrassed, and couldn't help touching his nose and lowering his head.

When Brother Song saw it, he glanced at Sister Chai, then changed the topic and said, "However, I am afraid that there is no way to convict just by virtue of hair." After all, they may be related, and it's not surprising that they can get into the counter. ”

"No," Sister Chai shook her head and said, "The hair is floating in a pool of blood, which means that the suspect fell into the scene after committing the crime, otherwise it should be soaked in blood, so the DNA extracted from 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 the luminol reagent sprayed did not react......"

Speaking of this, she paused and looked at Qi Yuan: "Xiao Qi, do you know what this means?" ”

Qi Yuan was stunned, he didn't expect her to suddenly take the school exam, but he reacted quickly, and after a turn of his mind, he said, "He walked through the window?" ”

"Nonsense!" She rolled her eyes: "Although it is also a suspicion that there is a door that does not go off the way and wants to open the window, but this is not the point."

The point is, why didn't he bring blood to the footprints he left when he left the scene through the window? ”