Malle is an unremarkable Nordic town. Pen × fun × Pavilion www. ｂｉｑｕｇｅ。 ｉｎｆｏ

It has a gentle, clean river, but it is frozen for six months of the year, and the rest of the year is often covered with crushed ice. It had a nice fitness trail, wide and straight, with nice planks for shock absorption, but three people died on it.

Malle is best known for its lithographs, which date back to the Viking Age, however, no one wants to come and see them. They may be works of art or antiques, but it wasn't until someone's blood soaked the land that the cameras came to the icy city.

Yang Rui jumped out of the car, and the snow creaked under his feet.

Yang Rui looked into the distance and could see the distant snow-capped mountains and the houses at the foot of the mountains.

"What a stretch place. Yang Rui praised: "There can be a distance of 100 meters between a house and a house." ”

"Swedes like to stay a little farther away. We don't like to hear from our neighbors, whether it's talking or shooting. Officer Ackerman slammed the door shut and followed behind Yang Rui.

Yang Rui's PCR technology recognized Ackerman's hair, which made him an instant fan of PCR technology, and not only that, but he also found his own information to read - Swedes are not a people who like to socialize, and their favorite thing to do is to squat in the corners of the world and study their own gadgets.

"Malle has 874 permanent residents. Ackerman asked, "Where do you want to start?"

"We first have to delineate the residents of the town, and if it is not done by people from other towns, we can directly collect the DNA of the residents. To be on the safe side, please do it under our guidance. The content of Yang Rui's explanation has actually been communicated before, but it is just a repetition of the explanation.

Ackerman needs exactly that kind of repetitive explanation.

PCR is a new thing for everyone, and everyone has to check it again and again, so as not to make a mistake and affect the result - in fact, Yang Rui emphasized this point.

The townspeople were given advance notice and quickly gathered.

This may be unthinkable in the United States, and you can't expect all the Americans in a town to assemble on time, but the Swedes can, whether it's a month's notice or a day's notice, as long as the time is fixed and confirmed, everyone will be obtained.

The descendants of these Vikings were silent, but they showed up at the rendezvous on time as if they were ready to board the ship.

"Isn't it unexpected?" Huang Mao walked behind Yang Rui and said, "Look at these Swedes, they all look ordinary, who would have guessed that there could be a murderer in them." ”

"It can't be said to be ordinary, many people are over 1.9 meters tall. Yang Rui shrugged.

"It's about the same as you. Huang Mao looked up at Yang Rui enviously and said, "You said how you look as tall as a Nordic person." No, it's taller than a lot of Northern Europeans. ”

"God-given. Yang Rui said sincerely.

Huang Mao laughed.

"For a while, ours will use a cotton swab to stir it in your mouth, and it will not damage your body, this is the latest technology, and it is used to do the necessary tests......" A senior police officer held the microphone and briefed the residents, his voice was flat, as if he were talking about an ordinary trivial matter.

It was as if the residents were listening to an ordinary trifl.

Instead, Yang Rui, standing below, picked up his red flag camera, waited for the first resident to start sampling, and then desperately pressed the shutter.

In an era when there were less than 30 photographs in a roll, his shutter quickly stopped pressing.

Yang Rui laughed to himself, opened the back cover of the camera, carefully put away the film, and then said to Jing Yulan next to him: "In the future, these are all formal historical materials." ”

"Historical data?" Jing Yulan was carrying LV's bag, wearing a wide-brimmed lady hat, and a pair of sunglasses hanging on the bridge of her nose to prevent snow blindness.

Yang Rui put his hand on her waist, hugged it lightly and let it go, and said with a smile: "The first time in human history to use PCR to handle cases, of course, it is a historical material, and this will definitely enter the museum in the future." ”

"You think it's important, what if others don't?" Jing Yulan joked with a smile.

Yang Rui thought for a moment and said, "Then I'll build a museum by myself." Yang Rui replied very clearly, which made Jing Yulan a little stunned.

Click.

Yang Rui pressed out a roll of photos in an instant.

During the entire sampling process, Huang Mao, Tu Xian and others supervised and assisted throughout the whole process.

Sampling is the most important step, and for the PCR itself, there are very few mistakes, but once there is a sampling error, it is all over.

Yang Rui looked very relaxed, but he was actually nervous.

If the murderer is not among the residents, if the sampling is wrong, if the technician has a problem with the operation...... He wanted a big news, not a big scandal.

However, this is how you do things, you have to accept the risks that are acceptable, if you can't accept them, end them early, and if you can accept them, you can't regret them.

The journey to Marle was soon over.

Yang Rui returned to Stockholm, and as soon as he began to sort out the samples, he was called into the office by Director Sherwood and asked: "Mr. Yang Rui, how long will it take to receive the results? I mean, how long will it take to identify the murderer." ”

"If you're lucky, tomorrow, if you're unlucky, it's estimated to take two or three days. Yang Rui said: "Our PCR machine is not enough to do all the samples at one time. ”

"That is, it takes three days to make all the samples, and only three hundred per day?" said Director Sherwood, who calculated, "Can you find more?"

"In fact, we can't do more than 200 samples a day, and we don't need to do all the samples. We can rule out some. ”

Mr. Yang Rui, you must know that we need some work to pass the PCR technology at the judge, and if we make a mistake the first time, it will be very difficult to pass it again. ”

Yang Rui smiled and said: "I won't miss it, we only excluded it when we were sure, in fact, we only excluded women." ”

"Didn't you commit the crime by a woman?"

"Well, because the murderer's DNA is male. Yang Rui briefly explained the relationship between the X and Y chromosomes to Sherwood, and said: "If the genome project is completed, we can rule out more things, and at present, the safest way is to exclude women, and then start testing with young residents." At the same time, a sample of women was taken to avoid surprises. ”

If the human genome project is completed, or if you can learn more about the human genome, you can get the DNA of the murderer, and you can draw a fairly detailed face, such as race, skin color, age, etc., which can be easily obtained, whether it is hooked nose or rosacea, curly hair or straight hair, there are traces to follow.

However, the 86-year-old Human Genome Project is still in its infancy, and there is almost nothing useful, at least nothing that can be used immediately at this time, Yang Rui is just saying.

Sherwood was not ready to ask for more scientific details, and the information Yang Rui told him had already made Sherwood quite satisfied, and said with a smile: "That's the best, I've already talked to the judges, and they will understand this technology independently, but I believe there is no problem......"

Although the concept of DNA has been around since the 50s, DNA as evidence is new all over the world, and every country's judicial system needs a process of acceptance.

Yang Rui had an idea earlier, and when he heard Sherwood say this, he couldn't help but say, "I have a proposal." ”

"Yes. ”

"You may be able to use some small cases that are more certain as examples of the application of PCR. If it passes once, will it be possible to solve the problem of judicial determination?" Yang Rui used unfamiliar English words to talk to Sherwood with difficulty.

He didn't need the Malle case to be the first case of the PCR, such a first had limited support for the press, he needed more of a solid case.

If the value of the PCR machine can be perfectly proven, and then the PCR can be publicized to solve complex cases, it may be more meaningful for Yang Rui.

Sherwood was a little surprised, and said, "Do you want to use a PCR machine to solve a few cases first?"

"That's right. If you don't have the funds to arrange it, we can provide a trial service. ”

"No, I don't. If it's a small case, the cost is not an issue. Sherwood obviously didn't care about the tens of thousands of kroner spending, but muttered: "You are very confident in the PCR machine." ”

"Of course. Yang Rui laughed, DNA identification is known as the king of physical evidence, and for a considerable period of time, the judicial systems of various countries have worshiped DNA as a god.

Sherwood didn't have the urge to worship God for the time being, but still agreed with Yang Rui's suggestion, from his point of view, it was always good to be able to choose a more secure way.