In 2009, 2011, and 2012, in the three cases, the Zeng family's neighborhood had been demolished, the Cai family's house was resold by relatives, and only the Guo family, because of their good financial situation, kept the original house.

In other words, this is the only crime scene that remains.

Although nine years have passed, all visible evidence has been taken away by the police, and the Guo family has come to clean up several times. But when it comes to returning to the crime scene, the key is not the evidence that is usually identified, but other neglected places.

Fortunately, Guo Yifang's relatives loved her very much. Many years after her death, her and her children's old things were still well collected.

Brother Guo, who brought them here, said, "My little sister and her friends' things are all here. When my mother was alive, she would come here every year to clean up. Now... Well, you can look around as you like. As long as we can find the murderer, anything is fine."

He didn't want to stay any longer in sadness, so he said a few words and left.

Ji Feng opened the carton and said, "Back in 2012, the police had already investigated several cases together. Their thinking was a serial murder case, which was different from ours, so the probability of finding new clues was quite high."

Jian Jing said "hmm" absent-mindedly.

Ji Feng noticed her wandering mind and

said calmly, "Ladies first, what do you want to check, Teacher Jian?" Jian Jing came back to her senses and thought, "I'll check Guo Yifang's things, and you can check the two children's things."

"Okay."

Guo Yifang had a lot of things, including a mobile phone and a computer. The police checked these electronic devices and found no valuable clues, so they all were returned.

Jian Jing found the power cord and plugged it in. Fortunately, it was not broken and could still be turned on.

First, she looked at the computer. The most common things in it were courseware and work reports she had made, some downloaded TV series, and many family photos.

It was time-consuming and laborious to screen them one by one, so Jian Jing simply removed the parts before 2011, and there were much less left.

But the courseware, papers, TV series and movies were of no value.

All the history records in the browser were deleted. The same

was true for the mobile phone. There were no special numbers in the communication records, no text messages worth noting, and the only photos were of the two children at home.

It was very abnormal. I was just looking through the photos on my computer. Before March, there were many photos of my son attending classes at the early childhood education center. Don't underestimate a mother. In their eyes, no matter how trivial the child is, they are all worth recording.

But after March, all the photos of the early childhood education center disappeared.

The scarred man deleted this part intentionally.

So, it was from March to May?

She opened Guo Yifang's notebook. She has a very good habit of recording her expenses every day and putting the invoices in it.

Among a pile of boring data on breakfast, milk, bus fares, and supermarket purchases, there was a missing clue.

The movie ticket cost was for two people.

But it was useless.

The surveillance of the cinema is retained for a maximum of fifteen days, and it has been nine years. Moreover, the police should not miss such obvious clues in the account book, and they have probably checked it.

Is there anything that is easy to overlook?

Mother, mother... She repeated it in her heart several times, and suddenly an idea flashed, and she took the computer again.

Although there is no historical record, there are several commonly used URLs collected in the browser.

Among them is a shopping website.

She tried to log in to the account directly using her mobile phone number and the abbreviations of her two children's names as the password.

She guessed it right and logged in smoothly.

Checking the shopping records, it was either clothes, snacks and toys bought for the children, or daily necessities for the household. She only bought two pieces of clothes worth one or two hundred yuan.

She pulled out the shopping list and called Ji Feng: "Did you find anything?"

He spread his hands.

"Here are Guo Yifang's shopping records." Jian Jing said, "Do you want to look for things that are different?"

Ji Feng raised his eyebrows: "What do you think he left for the mother and son of the Guo family?"

"This family is very special." She said thoughtfully, "Mother, is very special to him."

Ji Feng looked at her meaningfully, but did not ask anything, just said: "If there is, it must be a very important clue - let's start looking for it first."

There are a lot of things. Considering the time from March to May, they give priority to objects with newer appearance.

Even so, it took them six or seven hours to select three suitable options: a dinosaur toy, a fairy tale book, and a dress.

They called Guo Yifang's brother to eliminate the interference of family gifts. March to May are not the birthdays of the two children, nor is it Children's Day, so the probability of friends and relatives giving gifts is also low.

"Interesting." Ji Feng was amazed, "The dinosaur is for the eldest son, he has a bunch of such dolls, the fairy tale book is suitable for ages 4-6, it is for the youngest son, and the skirt is of course for Guo Yifang."

He asked: "Teacher Jian, among the three gifts, which one is the key?"

Jian Jing: "The skirt."

"Why?" He asked meaningfully.

However, Jian Jing was thinking with her eyes closed, and did not notice his abnormality. She said to herself: "According to what you said, his mother did not fulfill her duties. He lacked maternal love and longed to make up for the regrets. Then, he played the role of a child. The dinosaurs and books are too new."

Self-substitution is not done casually. It requires a medium, a ceremony that marks the eldest son as a substitute. Therefore, the gift should be something with his personal characteristics.

It should be more personal and more vintage.

Dinosaurs and books are too common, and it doesn't matter who you give them to.

The skirt is different.

Comparing the photos of the crime scene, it can be found that this skirt is not the one Guo Yifang wore when she died. It seems that there is nothing special.

But there are some vegetable stains on this dress, which is obviously worn.

But if you look closely at the photos

taken at the scene, you will find that on Mother's Day, the house was very clean and there was not a single dirty piece of clothing to be seen. "There was a cake on the table, but the plates were taken away. He did this because he didn't want to expose the fact that he had attended the party." Jian Jing sorted out her thoughts, "And for Guo Yifang, if she invites the person she is dating to her home, she must clean up first and wash all the dirty clothes."

She shook the skirt open and ran her fingertips over the fabric. There were no signs of water on the dress, but there were creases left, which were not caused by storage.

This showed that the skirt was new and had been worn but not washed before being changed.

"He gave this to Guo Yifang. She died wearing this skirt." Jian Jing was horrified. "He changed his clothes and hid it in the closet. No one noticed it."

Seeing her subtle expression, Ji Feng quickly made a joke: "It seems that he was still a cautious guy nine years ago. If it was worn by Guo Yifang, it would definitely arouse suspicion. Even I can see that this skirt is a bit rustic."

Jian Jing: "..."

"Am I wrong?"

She: "The deep V lapel and large floral pattern are indeed the style of the 80s, but it doesn't mean that no one wears it. Many people like this retro style now." "

...Ahem." Ji Feng cleared his throat as if nothing had happened, "No wonder the police didn't find anything unusual."

He changed the subject: "He gave this skirt specifically to Guo Yifang. What special meaning does it have?"

Jian Jing became suspicious: "You always like to ask me questions today, why don't you tell me?"

"That's what I say." He was very straightforward. After a moment's silence, he said, "Giving a woman a skirt like this doesn't seem like a son giving his mother, but like a man giving his woman. However, this skirt is too old-fashioned, indicating that he still hasn't escaped the influence of his childhood. So, my conclusion is--"

Ji Feng looked at her, as straightforward as ever: "He is mother-loving."

"Then why is he so good to his children?" Jian Jing questioned, "Men are all jealous, right? Even if the eldest son was a self-reflection, why did the younger son die in the same way? He attaches great importance to death and it's impossible for him to be lazy. This proves that he treats everyone equally."

Ji Feng seemed to be stumped by her question: "Yes, why?"

Jian Jing said nothing.

He asked again, "Teacher Jian, what do you think?"

"In my opinion," she said coldly, "You are trying to trick me."

Ji Feng said innocently, "Really?"

"If you want to break up, just say so." Jian Jing said unhappily, "Everyone should check their own affairs."

"No, no." He quickly handed over a bottle of water and soothed her, "I just thought you had new ideas today, and I was curious."

Jian Jing believed that he was hiding something: "Bullshit."

"Really, it's truer than gold." Ji Feng coaxed her, "I racked my brains last night, but I had no ideas. Teacher Jian is different. I can see that you have some ideas. Share them, right? Don't keep such good things to yourself. We should have a team spirit."

Jian Jing: "No." Ji Feng: "You can't be so stingy." She gave him a provocative look, with an expression of "

what can you do to me". Ji Feng held his forehead, and after a while, he negotiated: "Can I trade with you? I'll tell you something you don't know." Jian Jing stood up and said angrily: "What do you mean, are you hiding something from me?" Ji Feng: "I'm not hiding it from you, I just forgot to tell you." "If I want to trust you again, I'll take your last name." Jian Jing sneered, "You can say it or not, if you don't want to, forget it." She grabbed the handbag with one hand, bypassed the people and objects that were blocking her way with amazing agility, and slammed the door. Ji Feng: "Teacher Jian!" The door opened and the cold wind blew. He: "Leave me alone to clean up..." - What else? Jian Jing was almost angry to death. They agreed to investigate the case together, and she said everything she could say, which was sincere enough, but what about him? He said half and kept the other half, and tried a few words from time to time, as if she had been brainwashed by the scarred man and could turn evil at any time. Can people trust each other more? Even if some clues are not convenient to disclose due to regulations, there is nothing but human feelings beyond legal principles. We have known each other for so long, and you can't even make concessions? Ah, I'm so angry. I'd rather end my friendship with such a friend. It 's seven o'clock in the evening, and all the lights are on. The aroma of stewed meat wafts from the neighbor's house, tempting the glutton in my stomach. However, Ji Feng, who offended his companions, can only chew on biscuits while cleaning up the victim's belongings. There are so many thieves, and it's tiring to steal, and the wounds feel even more painful. At this time, the phone rang. He picked up the phone and said vaguely, "Lao Gao?" "Hey, what are you eating? Isn't it delicious?" Lao Gao, who was injured in the gold case last year, has long recovered and asked his colleagues with bad intentions, "Are you happy to go out with beautiful girls?" Ji Feng: "I'm doing hard work alone. Just say it. Are the results out?" "How can it be so fast." Lao Gao complained to him, "DNA screening in the country takes several days to line up. I just want to tell you that I have reported and I am in line." Ji Feng was depressed: "It took so long, it's harder than registering at Concord Hospital." "Nonsense, there are only a few doctors in Concord Hospital, and how many places can do screening?" Lao Gao said, "And don't hold out too much hope. Right now the database only contains criminals and missing children, so there's no guarantee that we can match them." Ji Feng was more open-minded: "Just try our luck, who knows. I've made some progress here, so maybe we can find the person by comparing them." "Tsk tsk tsk tsk, you're really concerned about Teacher Jian's case, and you're still going out of town on vacation." A colleague who doesn't gossip is not a good comrade, so Lao Gao couldn't help but inquire, "How's the situation?" Ji Feng sighed: "What can we do? Serial killers don't have normal brains." Lao Gao: "That's not what I'm asking you." "So you want to ask about the zombie case?" He teased, "I can solve cases even when I'm on vacation, are you jealous?" Lao Gao was speechless: "You deserve to be single." "No, I can still save you." Ji Feng said seriously, "Your daughter said she wants to marry me when she grows up." Lao Gao was furious: "Get out!!"