Han Bin took the letter and checked it repeatedly, but did not see obvious marks, and the words on the letter were also printed, and the handwriting could not be recognized.

Han Bin asked, "When was the last time you checked the express locker?"

Song Jingshan thought for a while and replied, "It should be that before the business trip, I left on the afternoon of September 6th, and I checked the express locker on the morning of September 6th." ”

Han Bin calculated, today is September 11th, and five days have passed, and it is possible to deliver threatening letters in these five days.

"Who has read or touched this letter?"

"I was alone, I didn't tell my wife because I was worried, and my daughter and my eldest son didn't live with us. I didn't tell them. ”

"Did you see any suspicious people around you when you picked up the letter?"

"I was stunned, I didn't care so much. I went straight to the police station. Song Jingshan leaned forward, widened his eyes and asked, "Captain Han, did you say that the person who wrote the threatening letter could be the murderer who killed my son." ”

Han Bin put the threatening letter back in the envelope, "Is it possible, have you ever received a threatening letter before?"

"Yes, I've received it once before. ”

"When?"

"About three months ago. ”

"Do you remember the exact time?"

"It seems to be June 10th. ”

Han Bin wrote it down in his notebook, "Did you call the police at that time?"

"Yes. I reported to the police at the Huaguang Road police station, and the police also went to my community to investigate, but they did not find anyone who wrote the threatening letter. ”

"Is there a difference between that threatening letter and this threatening letter?"

"It makes no difference. Song Jingshan took out a letter from his pocket and put it on Han Bin's desk, "Look, this is the original letter." ”

The same white envelope with a piece of paper inside that read, 'Song Jingshan, you can't die well, I will let your family die sooner or later!'

There is no difference between two threatening letters.

Han Bin felt that something was wrong, "Since you have already reported to the police, the first threatening letter should be kept by the police as evidence, why is it in your hands." ”

"Hey, as soon as you say this, I get angry, I called the police, but it didn't work, the police didn't catch anyone, saying it might be a child's prank. As soon as I heard it, I felt that something was wrong, and it was obvious that I didn't take my case seriously. Since the police station said it was a prank, there was no way to file a case, and I was afraid that they would lose the threatening letter and would come back. ”

"What investigation methods did the Huaguang Police Station take at that time?"

"I went to the two policemen, checked the express locker, and asked for the monitoring from the property, saying that I wanted to go back to check the monitoring, and asked me to wait for the notice at home. Song Jingshan sighed, "At the beginning, I still had a lot of hope, thinking that there might be news the next day, who knows, after waiting for one day, no one informed me after a week." ”

"In the second week, I took the initiative to call to inquire, and the police officer who answered the phone said that he didn't understand the situation and asked me to go to the police station to ask the police in charge of the case in person. ”

"I'm also right, this is for us to do things, and we really have to take the initiative. I went to the police station again to ask the person in charge of the case, but they said that the surveillance had been watched and no suspicious persons were found, and they asked me if I had received any more threatening letters. ”

"I said I didn't receive it again, and the police officer in charge of the case told me that it might be a prank, and asked me to go back and think about whether I had any conflicts with people recently, and said that they would continue to investigate the case. ”

"I believe you're a ghost......" Song Jingshan became more and more angry the more he said, but considering that Han Bin and the others were also policemen, the latter words were swallowed.

"Later, I waited another week and went to the police station again. ”

"Before I could open my mouth, people asked me if I had received any more threatening letters, and I said no. ”

"Yes, people said it was a prank, and there was not enough evidence to file a case, and the matter was over. Speaking of this, Song Jingshan showed an angry look and choked up, "If they had found out about the person who wrote the threatening letter earlier, maybe my son wouldn't have died!"

Han Bin didn't answer, and he couldn't answer either.

"In addition to checking the surveillance, has the police station done any other investigations?"

Song Jingshan thought for a while, "They said that they had visited our community, but there was no follow-up." ”

Han Bin asked, "Did they do a technical test on that threatening letter?"

"I don't know. After speaking, Song Jingshan showed a touch of self-deprecation, "I guess there shouldn't be, they didn't take the threatening letter seriously at all, in their words, I was neither physically injured nor property damaged, so it doesn't constitute a standard for filing a case at all." ”

Han Bin didn't say much about this, because the police officers at the police station were likely to act in accordance with the regulations. If responsibility is to be pursued, it is also a matter for the legal organs.

Han Bin can't control it, and he can't control it. What he can do is to handle the case at hand seriously and responsibly.

"Have you noticed anything else unusual in recent times?"

Song Jingshan pondered for a moment and shook his head, "No." No one ever looked for me, and something unusual happened. Originally, I thought it was a prank, but who would have thought ...... Hey......"

"Did you offend anyone three months ago?"

"I can't think of it, I don't think so. I have always been kind to others and valued peace, and I have never done anything immoral. ”

Han Bin said, "If you think about it carefully, it may be that you have offended someone before, and the other party only took action three months ago." ”

Song Jingshan was silent for a while, "I really can't remember." ”

"Captain Han, do you think this person who wrote the threatening letter will be the murderer of my son, if he really wants to take revenge on me, then wouldn't I have killed Bo Chen!"

Han Bin said, "Before the case is cleared, I can't give you an accurate answer." It's still what I said before, think about who is guilty, if this murderer is really coming at you, the clues you provide will be of great help to the police. “

Song Jingshan took a deep breath, "I understand, I must think about it." ”

Then, Han Bin rearranged the task, because of the lack of manpower, two more team members were transferred from the second group.

The players were then divided into three groups.

One group is responsible for checking the mobile phone number, and the second group is going to the Huaguang Police Station to understand the situation and transfer the file.

Han Bin took people to the community where Song Jingshan lived.

Before going, Han Bin sent both letters to the technical team and asked the technical team to help with the testing.

......

Rongding Garden Community.

This community is not far from the Yuhua Branch, which belongs to a high-end community with a high greening rate and is a large house.

Han Bin took a turn in the community, and the monitoring facilities in the community are very complete, including the entrance of the community, the entrance of the corridor, the elevator, and the underground garage.

Song Jingshan's family lives in Building No. 6.

There is no monitoring next to the courier cabinet in the lobby on the first floor, so there is no way to see who directly placed the threatening letter.

Han Bin walked around the community, and he already had a rough idea in his heart.

Then, Han Bin took people to the property company.

The person in charge of the property company is called Feng Lianhai, a middle-aged man about forty years old, and after learning the identity of Han Bin and others, he behaved very politely.

"Captain Han, if you have any orders, just say it, our property company will definitely cooperate. ”

Han Bin said, "I want to access the surveillance from September 6 to today. ”

"No problem, I'll be able to take you to the monitoring room right now. ”

Han Bin asked Li Qin and Bao Xing to go to the monitoring room to adjust the monitoring, while he himself stayed in the property hall, "How many exits are there in Building No. 6 where Mr. Song is located?"

Feng Lianhai thought for a while, "There are two of them, one is coming out of the unit door, and the other is going directly down the garage." ”

Han Bin asked, "If you take the stairs down the garage, will you be caught by the camera?" ”

"Yes. The door to the underground garage from the staircase is facing a surveillance camera, which can be photographed as long as outsiders have entered the unit. In terms of community security, we are still very thoughtful. ”

"How many families live in Building Six?"

Ma Lianhai opened his mouth and came, "Building No. 6 has seven floors, each floor has two stairs and two households, and a total of 14 families live. ”

Han Bin nodded, this is the benefit of a high-end community, ordinary communities are twenty or thirty floors, two ladders and four households, and there are nearly 100 households in this unit.

It is still beneficial to have fewer households, which reduces the difficulty of police investigation.