Detectives of Detective World

"82.7%, 86.3%, 85.6%."

When the facial bones of the three boys overlapped with those of the three men, the three people in front of the computer also saw this irrefutable news.

Although the bone contrast does not reach over 95%, the four boys and girls in the photo match all four people involved in the case. This can basically confirm that the four people in the photo looked like they were when they were young.

"Sure enough, as we speculated, Ritsuko Kuki has known Yakushiji and Kyouta Kawada, two anesthetic dealers, since she was a child."

Looking at the bone comparison and overlap on the computer, Koshimizu Nanatsuki couldn't help but speak.

"But Kyouta Kawada and Yakushiji are both from Kyoto, but Ritsuko Kuki is from Kanagawa Prefecture. Junior high school and high school are completely different."

Karasawa recalled the information of several people and said: "The 33-year-old Tsunoda police officer was 15 years old at the time. He was older than the other three, and he was also from Shimane.

There is no connection whatsoever with Ritsuko Kuki, Yakushiji and Kyouta Kawada. "

"But if this boy is really from the Tsunoda Police Department, that means we have found the truth about something, right?" Koshimizu Nanatsuki said, looking at the photo.

"Of these four people, two are now dead, and two of them have become fugitives."

Karasawa pondered: "Judging from the hidden relationship between the two, perhaps Ritsuko Kuki will have contact with Yakushiji."

"But where should we start to find each other?" Koshimizu Nanatsuki frowned: "Just knowing the relationship between them will not be of any help to their current hiding place."

"Saito, gather the people and get busy." Karasawa looked at Saito Hiroyuki: "I need you to conduct a thorough verification of this evidence!"

"clear."

Saito Hiroshi had a serious face and immediately summoned his elite soldiers to come here and start investigating the evidence brought by Karasawa and the others.

Some people may be confused. It's just a photo found in an envelope. The identities of the four boys and girls on it have also been determined. What else is there to investigate?

But if you just think this way, you are totally wrong, because in the eyes of scientific researchers, there are still many places that they have not investigated.

Because Tang Ze was originally a researcher, he was very careful when handling the evidence. After discovering it, he immediately put the envelope and photos into a sealed evidence bag.

Because of this, even the envelope and photo surfaces remain pristine.

And this caution also gave Tangze feedback.

Under the technician's investigation, they found a little soil inside the envelope and on the surface of the photo.

This soil is very little, even more like floating dust.

But this is enough, and some information can be obtained based on the ingredients. Whether this information is useful or not depends on the subsequent investigation.

In addition, after careful inspection, they also discovered a tiny dark brown dot on the back of the photo.

Although it had turned black, the technician's identification confirmed that the small bit of black was the blood that had dried and turned black.

Blood stains were found on photos taken when they were young. This alone made Karasawa and Koshimizu Nanatsuki have many associations.

In addition to the analysis of soil and blood stains, there is also the analysis of the nature of the photos.

After handing it over to technicians in the relevant fields, it was determined that the two photosensitive papers found in the homes of Ritsuko Kuki and Kyouta Kawada were both of the same brand and were developed at the same time.

The date engraved on the back of the photo can also prove this.

However, because 18 years have passed, whether other clues can be found requires more detailed investigation.

After the investigation of the photo itself is completed, the content of the photo is also the focus of investigation.

Of course, the protagonists of this investigation are no longer the four boys and girls, but the background of the photo itself.

Among the four people, only the anesthetic dealer Yakushiji and Kawada Kyota came from the same place and seemed to be related.

However, the two people who became criminals, Kuki Ritsuko, came from different places.

But they came together and took this group photo. There is naturally some reason why four children from different parts of the world met 18 years ago and finally took this photo.

Finding out where the photo was taken is not an easy task. Karasawa and Koshimizu Nanatsuki both gathered behind Hiroshi Saito's computer and looked at the clear photo scanned by the other party.

"The shadow here is very short, which means the time of taking the photo was at noon, right?"

Looking at the shadows under the feet of the four children, Tangze pointed and said: "The date on the back of the photo shows that it is early July, which is almost the summer solstice."

"You mean the angle of the shadow is locked to the latitude?" Hiroshi Saito immediately understood the meaning hidden in the words: "You are really good enough to find a job for me."

"At least I didn't leave the most troublesome work to you." Tang Ze smiled, sat at the computer next to him and said, "Send the photo to both of us."

"What do you want to do?" Hiroshi Saito asked.

“Isn’t there the ridgeline of a mountain behind this photo?”

Tangze clicked on the photo and clicked on the peaks under the sky: "We plan to compare the peak ridges across the country in the database to see if we can find the specific location where the four children were photographed."

"Go crazy."

Hiroshi Saito no longer complained about his troublesome work. He looked at the two people next to him in horror: "Do you know how long this comparison will take?

Moreover, the ridges in the photo were from 18 years ago, so there may be errors with the current database.

But sometimes you can't rely on machines at all, but you have to compare them one by one with your naked eyes. "

"There's nothing we can do now, right?"

Tangze shrugged and said, "The large force searching the area is also searching for both of us. It's better to find a way to find out the connection between them. Maybe we can also investigate some useful information."

To be honest, Tang Ze was also very frustrated by the investigation of this case. The murder cases were very clear, but the murderer was running around in the streets.

For example, Tang Ze can still use his strengths in a battle of wits and courage, but looking for a needle in a haystack is not what he is good at.

So I simply leave the job of arresting people to the large forces for the time being, and I can restore the truth here, and maybe I can gain something by then.

With Tangze taking the lead and working overtime, the entire scientific search and research team was like a machine operating at full capacity, and began to investigate suspicious points in all directions.

Scientific testing is boring and long. Many people finish their work late at night, so they simply sleep here.

The screening work for the two of them was not as arduous as expected. After all, the machine initially screened for those with too large differences in ridges, but it was not too easy because there were also many similar ridges.

The two of them worked all night and finally checked some of them, and the only ones left were those that were extremely similar.

At this stage of the investigation, even Tang Ze could not do any further screening. After all, the ridge line was just an outline. Unless he went to the field for investigation, he could not even think about finding the answer.

"I hope what we have done will be useful." He stretched his body and moved his body. Nanatsuki said.

"Get some rest and see if other people's investigations tomorrow can help us gain further results." Tang Ze stood up and left, and the two of them went to their respective dormitories to rest.

A night of silence.

Early the next morning, before everyone had time to have breakfast, Tang Ze called them to the conference room to sort out information.

First of all, the black spots in the photo are indeed human blood, and the blood type is O.

The ash-like smiling particles in the envelope are indeed soil, and they are still clay.

According to the data, the composition of feldspar is more than that of quartz. Judging from the proportion of metal oxides, it is a clay suitable for casting red pottery.

Based on the distribution of this kind of clay across the country, combined with the developer serial number printed on the back of the photo, it can basically be determined that it is in Kansai.

"In addition, judging the angle of the sun from the shadow, if it is around noon, the latitude is 35 degrees south."

Hiroshi Saito added: “In this way, most of them should be eliminated again.

But unfortunately, the mountains in the background are just ordinary broad-leaved forests, so it is difficult to find clues. "

"That's enough."

Tangze looked at the screening information and smiled: "Yesterday, Yueshui and I inspected the mountains, and there was only one mountain within our inspection scope!"

"This mountain is near Kyoto." Hiroshi Saito said, "We have to travel a long way now."

"It's okay, I'll ask a reliable guy to investigate."

When Tang Ze said this, he looked at the crowd and said, "I worked hard for you yesterday. I'll give you a day off today. You can go home and rest after breakfast."

Originally, Karasawa planned for Koshimizu Nanatsuki to also rest, but the other party was unwilling, so Karasawa asked her to go back to the dormitory first, and call her if she needed to go out if she had something to gain.

After that, Karasawa called Hattori Heiji.

Although this guy may be in school, judging from Hattori Heiji's usual grades and the frequency of solving cases on a daily basis, taking time off to solve cases is probably a normal thing for his class teacher.

The call was connected, and Hattori Heiji's hearty laughter came from the phone: "Let me guess the reason for your call. Is there any case that you need my help in investigating?"

"Yes, you are right."

Tangze smiled when he heard this and said directly: "I have a case here that needs to be investigated in the mountains near Kansai, but I can't leave here.

I wouldn't be too relieved if I left it to someone else, so I had to look for you. "

"No problem, I've been having nothing to do lately." Heiji Hattori agreed upon hearing this: "Then let's talk about the case."

"Well, although your father probably knows about this matter at the headquarters, you still remember to keep it a secret." After Karasawa warned him, he told Hattori Heiji the general situation of the case and their findings.

"Oh, that's where it is, I know." Heiji Hattori said solemnly when he heard the words: "I will ride a motorcycle over to investigate."

"Then I'll leave it to you. If you have any new information, tell me as soon as possible." Tang Ze asked.

"Leave it to me." Hattori Heiji agreed: "Don't worry, I will investigate everything clearly. Just wait for my good news."

After hanging up the phone, Tang Ze put the phone away and waited patiently.

Naturally, he was not idle during this period, but was paying attention to the search operations of the large search force.

But it's a pity that one is a narcotics dealer and the other is a former front-line criminal who is both a skateboarder. They sent out so many people to investigate, but they didn't find a trace.

In Kansai, Hattori Heiji, who had given the teacher a leave note, drove his motorcycle towards the Nishi Shigaraki Plateau that Karasawa mentioned.

Although this plateau is said to be near Kyoto, it is actually very close to Osaka, where Hattori Heiji is located, basically in the middle of the two cities.

The total distance between Osaka and Kyoto is only 50km. In Karasawa's hometown, it is basically the distance between a certain county and the city. In addition, the Nishi-Shigaraki Plateau is located in the middle of the two places, so the distance is basically 25km.

In this case, it would only be half an hour away by motorcycle at most. It was precisely because of this that Karasawa asked Hattori Heiji to go over and investigate.

If it was too far away, he might as well ask the local Ayanokouji Criminal Investigation Department in Kyoto to help with the investigation.

After riding a motorcycle for less than half an hour, Hattori Heiji arrived at Nishi Shigaraki Plateau.

Because there was an electronic version of the photo sent by Karasawa, Hattori Heiji quickly compared the peaks in the photo and the shapes of several large rocks on the ground, and determined that this was where the four children took a group photo.

Because it was a working day, there were not many people here, so Hattori Heiji easily found the person in charge here.

"Old man, do you know why four children from different places met here?"

I showed it to the person in charge with my mobile phone. After looking at the photo for a while, the person in charge replied without hesitation: "This is very simple. The beginning of July is the time for summer camp."

"Summer camp?" Hattori Heiji said suddenly after hearing this: "So that's it."

"Yes, this is our local specialty."

The old man smiled and said: "At this time every year, children and students from all over the country come to participate in summer camps.

Yeah, it was really lively at that time. Children from all over the world gathered together to do various activities and make friends from all over the world.

Unfortunately, due to the impact of the declining birthrate in recent years, there are not as many people as before. "

"Students from all over the country?" Hattori Heiji heard this and asked: "Are they sent by their parents alone?"

"Basically, registration is by class, but in order to let the children experience collective life, they will be deliberately separated." The old man replied.

"Then, do you have any impression of the children in the photos I showed you?"

Hattori Heiji asked: "Or is there any information that can verify that these children have been here before?

For example, the roster from 18 years ago or something? "

"There is no roster, but there should be evidence of the essential activities in our summer camp every year." The old man on the side said after hearing this.

"Really? Please take me over and have a look!"

When Hattori Heiji heard this, he was surprised and a little curious. He didn't know what the evidence the old man said was.

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