This assassination technique has various advantages.
But the only drawback is that it is too difficult.
"In other words, the prisoner knows the structure of the human body very well and is used to killing people like this?"
Hearing Karasawa's analysis, Ayanokouji Fumimaro frowned and said: "This is not something ordinary people can do. Even doctors who understand the structure of the human body may not be able to do it."
After all, theory is theory, but practice requires more experience.
"That's right, so I guess the other person is either a former soldier or a habitual murderer." Tang Ze nodded and said with a serious expression: "This prisoner is very dangerous."
"In fact, I have some suspicions that this is a serial murderer."
Ayanokouji Fumimaro said: "I did some research before and found that this method is very similar to the murderer of the "Teenage Killer Serial Case" that appeared two years ago.
At that time, all three of them were fatally stabbed in the back, and they were called the "Kyoto Murderers" by the people of Kyoto."
Following Ayanokouji Fumimaro's words, photos of three girls were displayed on the projection in the conference room in front.
And without exception, they are all women in their twenties.
"The murderer was not caught at that time, so it is very likely that he is the same person as this time."
Ayanokouji Fumimaro said with a solemn expression: "Besides this, there is another point. No matter whether it was before or this time, no murder weapon was found.
Not only that, every murder victim has a different heart wound.
In other words, every time the prisoner kills a person, he will change his knife."
"Changing knives? Is it a sense of ritual or a desire for collection?"
Tang Ze frowned and said: "But no matter which type it is, this prisoner is obviously a "happy prisoner".
The biggest characteristic of this kind of prisoner is that he is immersed in the pleasure of killing and unable to extricate himself.
Under such circumstances, he was able to stop in time, this prisoner is very dangerous."
"Yes, in addition there is a very important piece of information."
Ayanokouji Fumimaro said with a solemn expression: "The person in charge of this case two years ago was Yuji Sarutobi from the Investigation Division 1 at that time."
"Ex-criminal?"
After Ayanokouji Fumimaro finished speaking, all the criminals present were in an uproar, and soon began to discuss in low voices.
If everything before was just speculation, then everything is connected from this piece of information.
As the criminal responsible for this case, Yuji Sarutobi has been thinking about it even though it has not been solved.
After retiring, he has been working as a detective, investigating this unsolved case.
Now that the other party was killed using the same method, it is hard not to think that the other party investigated the murderer, which caused a crisis for the other party, and finally killed him and silenced him.
All of this can be connected naturally. There are experienced criminals at the scene. It goes without saying.
At this point, the intelligence coordination was completed, and the investigation surrounding this murder case began in the direction of "serial murderer".
As for Tangze, he went to Kesouyan.
After all, he came here this time to give some guidance to the Kyoto Science Search Research Institute, and his participation in this case was nominally to observe the operation and guidance of the Science Search Research Institute on the spot.
Therefore, he naturally cannot go on a search together with Ayanokouji Fumimaro and other criminals, otherwise the local criminals will definitely have an "exclusionary" mentality.
It would be better to focus on scientific research. All the evidence will be sent here for identification, ensuring that Tang Ze can keep up with the progress of the case and can participate in the investigation legitimately.
After Karasawa went to Kyoto for scientific research, the remains at the scene and the items carried by the victims had been delivered, and a group of researchers began to get busy.
Because Karasawa had previously worked with members of the local science search and research team in Kyoto to solve the "Arashiyama Man" case, some of the members were relatively familiar with it.
Of course, they also recruited many new people in the future, so Tang Ze saw that some people on the scene had relatively unfamiliar skills.
Obviously, it is because the old people have gone out to work in the field and the opportunities have been given to newcomers, and they have all taken over the more high-end and more technical scientific identification.
And now they are identifying these.
Restoration of shoe prints, use of body wounds to restore the shape of the murder weapon, hair on clothes
Each piece of physical evidence was tested and analyzed, and soon Tang Ze also obtained first-hand identification materials.
The first is the shoe prints collected from the site.
In addition to the footprints left by the deceased, another part was identified as the murderer's footprints. Apart from being identified as male, there was no record after comparison in the database.
In other words, apart from determining the gender, there is no gain.
As for the shape of the murder weapon reconstructed from the wounds on the victim's body, it was a scimitar with a slight curvature, which was not unusual.
In addition, during the autopsy, some tiny substances were collected from the victim's nails. Unfortunately, the third party's skin was not detected.
However, the first few pieces of evidence yielded little results, but the hair extracted from the clothes of the deceased's coat yielded a lot.
One of the hairs was not the hair of the deceased, but the hair of a third party, most likely left by the murderer.
After identification, the owner of the hair is an adult male with type A blood, and a DNA test is now being conducted.
In addition, there was hair wax attached to the hair, but unfortunately it was a popular brand and there was no way to trace it.
In addition to hair wax, they also detected another thing.
Spores of certain plants.
But it is not clear what kind of plant spores it is.
In order to understand this, we need professional plant experts who study fungi.
Naturally, their scientific research institute does not have such professional personnel, so if you want to inquire, you can only go to the Fungi Research Institute in Kyoto.
Seeing that the scientific search and research clues in front of him could only go so far, Tang Ze was unwilling to remain idle, so he took the initiative to take over the task and went to the Fungi Research Institute.
Tangze asked the director to send a new researcher to run errands with him.
After all, when two people are working together, they still need a partner.
After a brief self-introduction, Tang Ze also knew the other party’s name, Qingtian Yuhua.
It was a very poetic name, and only after talking to him did Tangze find out that the other person was his fan. After learning that he was going to go on field trips with him, he volunteered to sign up to act with him.
Tang Ze is also used to this. After all, he has a lot of identities, including a criminal, a mystery writer, and a rich man.
Either one is likely to arouse people's admiration.
The two drove quickly to the Fungi Research Institute, and then connected with the researcher they had contacted in advance.
"Hello, I am Qingtian Yuhua from Kesouyan."
Yuka Aoda bowed to the young researcher and introduced: "This is Karasawa Criminal from Tokyo."
"Hello, I'm Jun Tsukidate." The female researcher in front of her looks young, and she is also a beauty that would make Kogoro Mouri look crazy and attentive.
However, Tang Ze has family members, so no matter how beautiful the other person is, it has nothing to do with his family.
After the greetings, Tangze took out the information and handed it to the other party.
"These are the spores of shiitake mushrooms!"
After looking at the magnified image under the microscope, Tsukidate Jun said: "You can't be wrong, these buns are often used here."
"So that's it."
Tangze nodded and said, "Then I wonder if we can find out where we got these spores?
If it can be found, it will be an important clue to the case."
"It's very difficult." Tsukidate Jun shook his head and said, "As for the spores of shiitake mushrooms, they may stick to them even when cooking, so the source is very troublesome."
"is that so?"
Tang Ze, who had already expected it, was not disappointed when he heard Tsukidate Jun's words. Instead, he nodded and stood up and thanked: "In any case, thank you Teacher Tsukidate for your help."
"No, no, I didn't help either."
Seeing that Tang Ze and the others were about to leave, Jun Tsukidate had an embarrassed look on his face and quickly stood up to see them off.
Just when Tang Ze and the two were about to say goodbye, they didn't expect that the office was suddenly pushed away.
After the two people who were still chatting heard the noise, they subconsciously looked at the door and found that a male researcher wearing glasses walked in.
"Ah, my teacher Sun Li!"
Tsukidate Jun immediately shouted after seeing the other party: "Teacher, your luggage has been placed on the table like this for a long time."
"Ah, it must be something sent from England." Gosunli looked in the direction Tsukidate Jun was pointing and smiled.
"Those things have been there for a long time, please take them away as soon as possible." Jun Tsukidate said angrily.
"Okay, okay, I understand."
Wu Sunli nodded repeatedly when he heard what the other party said, but he did not go to pick up the luggage immediately. Instead, he went to the refrigerator in the corner to get a drink of water.
"I'm so sorry, Karasawa Criminal." After Tsukidate Jun finished explaining to the other party, he smiled apologetically at Karasawa: "If you need help, you are welcome to come back at any time."
"Um."
Tang Ze nodded and left with Qingtian Yuhua.
As they watched the two people leave, the colleagues in the office came over and asked about Junrai Tsukidate.
In just a few words, Tsukidate Jun explained clearly, and the office returned to calm.
In a dark room.
Wisps of sunlight shone in, giving the entire room a dark tone.
In such a dark room, the little black man sat at the table and opened a letter.
There was a little curiosity in his eyes.
Since there is no name on the letter, I don't know who mailed it.
So he wanted to know what the content of the letter was.
Cutting open one side of the letter, the little black man took out the envelope and opened the white paper inside.
But when he saw the contents of the letter, his expression instantly turned ferocious, and his eyes were filled with scarlet murderous intent.
And there was one sentence written on that piece of paper.
——【I saw you kill someone.】
This is absolutely intolerable to little black people.
After he killed three people two years ago and realized that he was at risk of being exposed, he directly chose to lie low and dormant.
However, even though some people have retired, they still cling to this case and are even close to tracing it to themselves step by step.
Then naturally he can only tell the other party to shut up.
But I didn't expect that someone would actually see him when he was trying to silence the other party.
And this person also knew his identity and sent a letter to his home.
He knew that the other party did not call the police, but chose to send a letter, just to threaten him.
But whether it's money or asking him to help with work, this kind of blackmail is something he will never tolerate.
When the little black man thought of the condescending expression of the sender, his expression became even more terrifying and ferocious.
But his excitement lasted only a moment.
Soon his rapid breathing became calm again, and the ferocious look on his face gradually faded away, as if it had never appeared before.
He picked up the envelope again and after examining it carefully, he found that there was a postmark stamped on the surface.
The address shown above is "Kobe".
Boiling murderous intent was brewing in his heart, but he became calmer and calmer.
He returned to the crime scene again and saw a hotel next to the renovated warehouse.
I looked up and saw an aunt in the hotel cleaning the room.
And since you can clearly see the scene inside the house from below, it would not be surprising if someone stood in that position yesterday and saw the scene of killing someone.
The little black man rolled his eyes and quickly stepped into the hotel.
Soon he left the hotel, and the little black man walked to the phone booth in the corner and dialed the hotel's front desk.
"Thank you for your call. This is Jingluo Hotel. I am Lishui, the front desk clerk, at your service. Is there anything I can do to help you?"
"Ah, that's right, I left my watch in your hotel." The little black man said in a gentle tone.
"Watch?" the female receptionist asked sweetly: "Then do you still remember the time and place?"
"It should be on the third floor of your conference room." The little black man recalled: "Based on the time, it should be last night."
"The conference room on the third floor last night?"
The female receptionist repeated it, and after waiting for a while, she quickly said with a smile: "I found it, it's the meeting of branch directors of Gongjin Publishing, right?"
"Ah, yes, that's right, it's this meeting." After hearing the information revealed by the female receptionist, the little black man showed a sinister smile on his lips.
"Ah, okay, we will investigate immediately and contact you again later. What is your contact information?"
"Ah, no need, I just found it, it's really troublesome!"
After saying that, the little black man hung up the phone directly.
Leaving the phone booth, the little black man quickly blended into the crowd.
When Tang Ze and the two returned to the Science Search and Research Institute, some identification results that had taken a long time to wait were also released.
Among them, the DNA identification results of the hair attached to Sarutobi's former criminal jacket were compared with the database and found to have a criminal record.
And the case was exactly the "Teenage Killer Serial Case" two years ago.
The DNA of the beard collected from the fingernails of the second victim was exactly the same as that of the hair collected from Yuji Sarutobi this time.
In other words, after this case, their previous speculations have been completely confirmed.
Although there is no obvious progress in the identity of the prisoner, the emergence of this piece of evidence clarifies the direction.
There is no need to consider other possibilities next, just continue investigating in this direction.
And with a target, the efficiency of the search can be improved a lot, which can be regarded as a small breakthrough.