National Forensic Doctor

"Judging from the plants at the excavation site, the suitcase containing the antiques was buried between one and two years. If it is initially determined to be October last year, as long as the previous approximate location is determined, the case will be very clear. Big progress has been made.”

Jiang Yuan stood up and began to integrate the case and technology.

The trend of everyone's chat suddenly changed.

Pang Jidong asked: "Can the data from your road cameras be retained for such a long time?"

"No." Cui Qishan replied, and added: "It may be possible to install portrait bayonet on some main roads. This also needs to be determined which section of the road it is, and then it depends on whether the suspect is driving, riding, or walking."

"How about trying satellite?" The botanist who had just pulled out the satellite image immediately turned on the computer, opened several websites, and pondered: "We can try our luck with some satellite data, such as Satellites such as worldview3, worldview4, and BJ-3 have a resolution of 3 meters, so they should be able to identify people."

"When the satellite happened to pass by, did the suspect also pass by? The chance is too low."

"Some satellites pass by very frequently, many of them a day, and this is the capital. Moreover, the number of satellites is also very large. In addition to what I just mentioned, there are at least a dozen of them such as GeoEye and Kompsat-3A. There are 4-meter commercial optical satellites, and there are more 5-meter ones like Pleiades and Gaojing-1..." Botanists who work on satellites are familiar with them.

Cui Qishan's eyes lit up: "Is this still possible? This is much clearer than the satellite image on Baidu Maps."

The botanists laughed.

Pang Jidong coughed twice and said, "Don't buy additional satellite data. Use the resources of the remote sensing satellites in the background if they can be used. If not, forget about it. It's not cheap."

Tao Lu said sensitively: "We are doing an antique case...Things like satellites are too advanced, unnecessary, not necessary at all."

The botanist who just read out a string of satellite names frowned: "Isn't the police department quite rich now?"

"Then you can't spend money on lottery tickets."

"If you buy more, it won't be a lottery. In fact, if you are willing to pay, you can not even buy the data, just buy the suspect and let the satellite company find it for you. In this case, hundreds of millions of satellites The cost of data resources is saved. Even if they hire 100 people to search for data, it will only cost hundreds of thousands of yuan. Alas, the cost is much lower if it is done this way!"

Tao Lu's ears almost swelled when he heard this: "I'm just investigating a case worth tens of millions, and it costs me millions? Tens of millions more? That's not a losing business!"

"Your police department is a unit that spends money. Even if you find antiques, you can't sell them. It costs millions or tens of millions. Isn't it all to solve the case... Sigh..." the botanist said Shaking his head, it was true that he wanted to use some satellite resources, but Tao Lu seemed to really have no money.

forget about it.

"First determine the specific location. Pull out the satellite map of Olin West Road." Jiang Yuan gave an order to Wang Chuanxing.

The backstage of Zhengguang Bureau also has satellite remote sensing images of the whole city. In fact, many satellite image data are free, such as a lot of data from NASA, such as the data of the American Keyhole Reconnaissance Satellite as of 1984, which is almost 25 years. Get it for free.

In theory, people all over the world can see what Americans saw through satellites in the 1960s and 1970s!

In comparison, the small green belt on Olin West Road looks very ordinary from the satellite image.

"The distribution of pollen in the green belt of Olin West Road is indeed consistent with the type of pollen we extracted." Jiang Yuan first made a judgment and then said: "To determine the specific location now, we have to look at the proportion of pollen."

Jiang Yuan took out his notebook again, took a look at it, and said: "Although the suitcase has been buried in the soil for a while, there is still pollen attached to the suitcase, and there is a lot of pollen in the soil, especially the two This side between the suitcases has the largest amount of pollen left behind.”

"The number and types of pollen inside the suitcase are far less than those outside the suitcase, but if you look carefully at their types, they are basically from the green belt on Olin West Road."

“This shows that the outer parts of these two suitcases not only came into contact with the green belt of Olin West Road, or were placed near the green belt of Olin West Road for a long time, but this also happened when the suitcases were opened. "

Jiang Yuan stopped while he was talking. The botanists were not surprised and waited quietly.

It is normal for academics to suddenly have new ideas when they are full of passion.

Some of them took notes, and at this time they repeatedly read what Jiang Yuan had just said - if Jiang Yuan could understand something through these words, then maybe he could too.

"Actually, the pollen found in the suitcase may not have fallen in after the suitcase was opened. No one would leave the suitcase open for a long time. It is possible that the antique vases and bronze statues were in the suitcase. The use of foam plastic may have brushed the pollen out of the inside and outside of the vase.”

When Jiang Yuan said this, everyone nodded.

Botanists have not done such experiments, and it is not very clear - the difference between botany and forensic botany is that botany is the science of plants themselves, while forensic botany is often about plants and the relationship between plants and other things. relation.

For example, will pollen stick to the bottle, and under what circumstances will it be wiped off the bottle...

As a criminal police officer, Cui Qishan didn't think too much and just asked: "So, can the location be determined now?"

"Let's look for it."

Jiang Yuan asked Wang Chuanxing to pull satellite pictures bit by bit.

The green belt is just a line. Although it is very long, if you zoom in a little and look at it, it doesn't feel like it is a waste of effort.

Botanists are even more happy.

"Here here!" Someone shouted as they looked at it.

“The proportions of lilacs are wrong.”

"You see that the current ratio is wrong. In October, the ratio may be right."

"Is it possible that the number of lilac trees now is the same as the number of trees in October. And there is a relationship between the number and proportion of blooms?" When discussing academics, scholars can definitely be very mean.

Although the scholar who was attacked was not young, he could only calm down.

Most scholars have no hope of becoming outstanding youths in their lives, and they are not so particular about worldliness and sophistication.

Wang Chuanxing continued to pull the satellite images, but no one spoke for a long time.

Cui Qishan felt uncomfortable standing in front of him, and whispered to Tao Lu: "Don't skip it. The clarity is a bit low."

"The pattern has opened up." Tao Lu said: "If you pass it a little bit, just do it again. It doesn't cost any money."

"How is it here?"

Jiang Yuan stopped Wang Chuanxing.

This time, Su Lei stood up and said, "Is the number of roses too few?"

"Well, indeed..." Jiang Yuan waved his hand and asked Wang Chuanxing to continue pulling.

After repeated attempts, we finally selected a location.

"Antique bottles or boxes should have been placed near here for a long time." Jiang Yuan and others came to the conclusion after a brief discussion.

Although it has changed from the previous investigation direction, this is really normal.

Cui Qishan nodded and called out.

Soon, Xiao Si's call came back: "We found an auction company."

It is natural for an auction company to have antiques.

Cui Qishan thought about it and said, "Check with the nearby police station to find out the situation, and ask the police or people from other departments to go up and have a look. Don't alert the enemy."

"Yes." Li Jiang hung up the phone after saying that.

"It's probably going to be a long wait. Let's have something to eat first." Tao Lu took the initiative to stand up. Regardless of whether the case could be solved or not, the botanists on site had put in a lot of effort.

Everyone filed out and went to...the cafeteria to eat.

Not long after we sat down, Xiao Si called again: "We entered the auction company, and when the people inside saw the police, they ran away!"

"All of them ran away?" Cui Qishan's face darkened. It was impossible for all of them to be good people and just run away when they saw the police.

Xiao Si smiled bitterly: "Not all of them ran away, the front desk was there. There was one who was defecating in the toilet, and the rest ran away from the other door. Some people chased them, but I guess they couldn't catch a few of them. .”