"Ink, paper, and envelopes are all common items on the market, and they have no value for tracing!"

"Sister Chiyo, how will you know if you don't try?"

Lin Xiuyi pleaded relentlessly.

"Lord Police Department, your class is higher than mine, so it's not appropriate to call me Sister Chiyo, and I hate being called my sister the most, especially men..."

Chiyo Tanaka angrily rejected Lin Shuichi's proposal.

"Isn't the omnipotent Chiyo-chan really unable to do anything this time?"

Lin Xiuyi pretended to be surprised.

"Sorry, you can take these letters back now, I think our identification is over!"

After Chiyo Tanaka finished speaking, he angrily put the evidence box that Lin Xiuyi sent over in his arms. Then he picked up a report on the table and pretended to be busy, ignoring Lin Xiuyi.

"what……"

"no……"

Lin Xiuyi wanted to say something, but unfortunately he was blocked by Tanaka Chiyo just as he took a breath. In desperation, Lin Xiuyi left the forensics class with the evidence box in disappointment.

Although it was rejected by Chiyo, Lin Xiuyi did not feel dissatisfied with Chiyo because of this incident. In the final analysis, even he himself felt that the proposal just now was a bit difficult for a strong man.

Ink, paper, and envelopes are all common goods, which means that the manufacturers of these products have extensive sales channels and strong production capacity. The forensics class simply did not have the energy and time to satisfy Lin Xiuyi's thoughts.

However, Lin Xiuyi did not give up on this, because Lin Xiuyi hadn't had time to track down the postmarks on these letters. Since these letters were all sent by prisoners, it meant that these postmarks could roughly show the area where the prisoners were active.

Lin Xiuyi returned to the Special Investigation Department's office with the evidence box in his hand. He quickly cleared an empty table, and then Lin Xiuyi began to place the letters on the table in order of time.

The information revealed on the postmark is very simple, and generally shows where the mail comes from. Lin Xiu had a total of twenty-seven letters in his hand, and he quickly arranged them according to the areas they were mailed from.

Among them, the number of letters with the Bunkyo postmark is the largest, with a total of 7 letters, which means that 7 pieces of mail are sent from the Bunkyo district.

The second largest number of letters were stamped with the postmark of Meguro, with a total of 5 letters, which proved that these 5 letters were sent from Meguro District.

Among the remaining letters, there are 4 letters from Minato Ward, 4 from Nakano Ward, and 3 each from Nishitokyo City and Mitaka City under Tokyo Metropolitan Government. As for the last letter, it came from Musashino City, where Morimura Middle School is located.

If you look at the areas where letters are sent on the map, Lin Xiuyi didn't find any patterns. It seems that the prisoner seems to have no fixed place of residence, and the place where the letter is sent is not fixed. Was this intentional by the prisoners, or was there a real need to send letters in these areas?

Just when Lin Xiuyi was studying these postmarks and trying to find out the possible law of the prisoners' activities. Miki suddenly returned to the office. As soon as she saw Lin Xiuyi, she said excitedly:

"Police, I just found a similar case in the database, but not in Tokyo, but in Kamogawa City, Chiba Prefecture..."

As soon as Lin Xiu heard Miki's excited narration, he immediately stopped his work. Followed Miki to the front of the computer.

Miki quickly opened the information search network within the Metropolitan Police Department, and then entered keywords such as missing girl, theft, etc., and set the time. A few related cases were quickly listed on the screen.

Miki turned back a few pages until she found a case of disappearance that happened in Kamogawa City, Chiba Prefecture 2 years ago, and then returned the mouse to Lin Xiuyi.

Lin Xiu opened the relevant information about the case at one point, and then read it carefully with Miki.

This case was a disappearance case that happened two years ago. The missing girl was named Arisa Ninomiya, a student at a private middle school in Kamogawa City. According to the records, Ninomiya Arisa does not seem to be very gregarious in school, and is always rejected by her classmates. However, when Lin Xiuyi saw the girl's ID photo, he felt that she was the same as Yano Tomomi.

Arisa Ninomiya's appearance is also quite cute, and even the family conditions are similar to Yano Tomomi. From this point of view, if the case can be dealt with together, Lin Xiuyi also seems to have found the suspect's preference when selecting victims.

However, what is more similar later is that Arisa Ninomiya was taken to a nearby Koban for stealing goods from a convenience store the afternoon before her disappearance. After Jiaofan’s patrol police notified Arisa Ninomiya’s parents, her parents took her home until Arisa Ninomiya went to school as usual the next day, and she never returned home after that.

Arisa Ninomiya's parents sent a letter explaining their runaway from under her pillow after she ran away. It is precisely because of the existence of this letter that the police simply investigated the whereabouts of Arisa Ninomiya at first. Until a few days later, Arisa Ninomiya's parents discovered the letter that her daughter sent home asking for living expenses abroad. After that, the police finally confirmed that the case was indeed a runaway case because of the identification of the notes of the letter, and immediately closed the case.

Originally, Arisa Ninomiya's parents thought their daughter would go home soon. Because their daughter promised in the letter that she would go home as soon as possible after receiving the money~lightnovelpub.net~ But then they found out that things were not what they expected at all. However, because the police have already closed the case, and since Arisa Ninomiya's handwritten letter is sent to her home from time to time, the police cannot re-open the case in the name of the disappearance case (the principle of no two cases in the Japanese Criminal Procedure Law) , and it is impossible to prove that Arisa Ninomiya has been killed or controlled, so until now, Arisa Ninomiya is still a missing person whose whereabouts are unknown.

After Lin Xiuyi and Miki read the information about the case, they stood up and started packing.

"Miki, Kamogawa City, Chiba Prefecture, contact them on the way and tell them that we need to get all the information about this case, and it's best for us to have an interview with the family."

"Understood, police department!"

...

Lin Xiuyi and Miki walked out of the special search department's office one after the other, sorting their belongings as they walked. Lin Xiuyi had a bad hunch that there might be more victims waiting for Lin Xiuyi to discover. Because like the case of Tomomi Yano, Arisa Ninomiya's case also has a very high degree of completion, and this is by no means something that can be learned overnight.