With the development of genetic technology, the "twin" bridge, which once really caused a huge problem to the police, and is still played by many literature, film and television works, is no longer a difficulty.
In the past, identical twins could only be distinguished by fingerprints, not by genes.
Because, the full set of genes of identical twins are derived from the same fertilized egg cell, even if there are objective changes such as gene mutation and selective expression, there will be differences in certain or many aspects such as height, stature, double quotient, personality, etc., and two completely different sets of fingerprints will inevitably be formed, but purely from the genetic point of view, the identity of the two is still extremely high.
The mainstream DNA identification belongs to the "feature point identification method", that is, the genetic material is extracted from each of the two samples, and a certain gene is intercepted after dehelixing, and dozens of feature points on it are selected for comparison.
In this way, the feature points selected from the two samples of identical twins are likely to coincide completely, and the judgment of "the same person" is made.
This is also the theoretical basis of the "twin" terrier.
However, in addition to the identification of feature points, the Genetic Testing and Appraisal Office of the Judicial Appraisal Center of the Provincial Department also has the technology of "base pair identification one by one", which can accurately identify who is A and who is B even if it is a twin.
Even, as long as the equipment is in place, Zhou Qianxin can roll up her sleeves and do it herself.
After all, this technology does not have an essential breakthrough compared with the feature point identification method, but the workload and statistics are much heavier, so it has higher requirements for the ability of all aspects of the equipment, coupled with the accurate judgment of the "mutation" situation.
Yuan Youchong pondered for a while and said: "This is no problem, whether it is to determine the victim or the murderer, it is very important to prove the identity, since the results of the preliminary appraisal are doubtful, it is also appropriate to report it for verification and inquest." ” Yu Chen was unwilling to be lonely, so he also interjected and asked: "Yes, but is there a detailed base pair sequencing record of these two brothers?"
"What do you say" Zhou Qianxin rolled her eyes: "How did you determine that the criminal was Wan Yongfeng and not Wan Yonghang, and it wasn't that the provincial department made an appraisal, did you say that there was a record above?"
"Uh" An embarrassed look flashed on Yu Chen's face, but he quickly returned to normal and said, "Then send it up."
However, regardless of whether the victim of this case is alive or not, whether it is a murder or not, you, the director of the forensic medical department, will definitely not be able to leave, or otherwise, I will send someone to you and ask him to send it, and you will not go. ” "I'm okay with that."
Zhou Qianxin shrugged: "Then open a letter of introduction." ” "Letter of introduction" Yu Chen raised his eyebrows: "I have a bunch of them in my drawer, just take them out and sign them and stamp them." ” "Oh" Zhou Qianxin glanced at him, turned around and walked out of the office, and said at the same time: "I can't hide it, so am I."
Anyway, who hasn't had a letter of introduction in the drawer?"
"I'm so proud," Yu Chen's face fell.
"I'll go back to sign the letter of introduction, you are ready to send someone over quickly, don't waste time."
"Oh" Twenty minutes later, Zhou Qianxin handed over a small inquest box filled with shockproof foam and inserted a few test tubes to a criminal policeman, gave him a letter of introduction, and said: "What to do, Team Yu should have told you, I won't say anything, be careful on the road" "Okay."
The little criminal policeman nodded, patted his chest and promised: "Don't worry, Director Zhou, I will definitely take the inspection materials" Zhou Qianxin waved her hand: "Hurry up, go back quickly" "Oh."
The words were interrupted, and the little detective was not annoyed, only a little embarrassed, and scratched his head and left.
As soon as he walked to the door, he suddenly thought of something, and quickly turned his head: "By the way, Director Zhou, Team Yu will let you go over if you have time." ” "Now" "Well, he said wait at the gate."
"Okay, I see, thanks."
After seeing him leave, Zhou Qianxin stood up and muttered as she walked out: "This dinner maniac is looking for me at this point, he won't want to pull everyone to eat together, right, what the situation of this case is is not clear, coupled with the blatant provocation of the suspect, he can't have this mind."
"That's what happened" Thinking of this, her feet were a little faster, and she even ran directly.
Seeing that the elevator was still on the fourth floor, she thought about it for a while, and decided not to wait, and went directly up the stairs to the first floor.
As soon as she ran out of the stairwell and evened out her breath, she saw a lot of police officers gathered outside the glass door of the building, so she walked over and asked, "What happened?"
"Say it on the way."
Yu Chen walked over: "Get in the car first." ” "Okay."
On the road, Yu Chen told while driving: "An hour ago, the police center received a report that a man rode a motorcycle straight into the Fujiang River, and the nearest colleagues and firefighters immediately dispatched, but unfortunately when the person was fished up, the person had drowned, and his breathing, heartbeat and even pupil reflex had disappeared." ” "This person" Zhou Qianxin's eyes narrowed: "It won't be the one who sent the package at noon today?"
"Yes" Yu Chen took a breath: "I have already informed the major criminal investigation teams under my subordinates and asked them to pay attention to this person."
When the captain of the Fujiang Sub-district Criminal Investigation Brigade arrived at the scene, he found that the clothes and general body characteristics of the drowned man were very similar to those we described, and the motorcycle that was fished up was also the same as what we described. ” So he immediately took a picture and let us know.
Lao Yu and I looked at it and compared the surveillance video, and it was certain that the man who drowned was the one who sent us the package. ” "He only found a lump of soaked cash, no wallet, bank card, ID card, etc., nor did he find his mobile phone, and his identity could not be confirmed for the time being."
"In addition, according to eyewitnesses at the scene, he parked his motorcycle on the side of the road before his death, leaned half on the car, and talked on the phone with people, but soon he became emotional, seemed to quarrel with the other party, and once got on the motorcycle and wanted to leave, and finally gave up."
In the end, he hung up the phone in a dejected manner, sat on the side of the road and smoked half a cigarette, then stood up suddenly, threw the mobile phone into the Fujiang River, and then got on a motorcycle, lit a fire, fired oil, and rushed directly into the Fujiang River with people and cars "It's really well described."
Zhou Qianxin asked: "What is this witness doing?"
"Middle school teacher, night runner."
Yu Chen said: "He ran along the Fujiang River at night, and when he found out about this, he probably had a bit of gossip, so he turned around and ran around the deceased several times.
"Torture and murder :