Chapter 767

Han Bin asked the property company for a list of owners and contact information of No. 6 building, which can be used when checking and monitoring.

As for the express cabinets in building 6, there is a gap at the top of each cabinet, which is specially used for delivering letters. The possibility of leaving DNA and fingerprints is very small, and even if there is one, it may not be the killer.

After Li Qin and Bao Xing copy and monitor the scene, the investigation is basically completed, and Han Bin takes people back to Yuhua Branch.

After returning to the office, Han Bin found that Li Hui had come back from the Huaguang police station, "you boy is fast."

Li Hui said, "I'll be back when I finish handing over with the comrades in the police station."

Han Bin yawned and sat on the chair, "what clues do they have over there?"

"After receiving the alarm from Song Jingshan, they made a special trip to the community where song Jingshan lived and copied the surveillance video of the community." Li Hui put a piece of information in front of Han Bin, "this is the file at that time, there are records of song Jingshan, there are their investigation process."

Han Bin looked through the file, song Jingshan's record is roughly the same as today's record.

However, Han Bin's attention was attracted by a note. According to song Jingshan, he found that there were more letters in the express cabinet on the morning of June 10. The last time he checked the express cabinet was on the morning of June 8, that is to say, the last time he committed the crime was between June 8 and June 10.

Before taking notes, Han Bin also asked about the first threatening letter and the exact time. But song Jingshan only remembered that it was reported to the police on June 10. When he found the threatening letter, he couldn't remember the last time he checked the express cabinet.

Apart from this, there are no other valuable clues on the file, and the process of investigation is very simple.

Han Bin threw the file on the table, glanced at the people, "don't say anything, check the monitoring."

"We need to check not only the surveillance of the last five days, but also the surveillance of June 8, June 9 and June 10. We also need to compare the surveillance videos of the first and second threatening letters to find out the common characteristics of the suspects."

"Yes." The crowd split up.

Before long, Duqi also came back from the communication company. He was responsible for investigating the call records of "brother Zhao" to see if he could find the clues of brother Zhao from his contacts.

After Duqi reports to Hanbin, Hanbin asks him to check with Mai Jun.

This is also a tedious work.

Han Bin poured a cup of tea and stood by the window thinking about the case.

This threatening letter seems to be a bit abrupt, but if you think about it carefully, you will find that the timeline of the threatening letter is probably before Song bochen's death.

Song Jingshan was on a business trip on September 6, that is to say, on the 6th, 7th, 8th and 9th, the suspect may deliver threatening letters, while song bochen died on the afternoon of September 9.

The murderer probably sent a threatening letter first, and then killed song bochen, song Jingshan's son, out of revenge.

Song bochen's death also coincides with the saying that his family is broken and others are dead.

However, if the murderer has decided to kill, what is the significance of his threatening letter?

Is it to remind song Jingshan? It doesn't make sense.

Of course, there is another kind of threat letter that may be delivered after the murderer killed someone. The purpose is to stimulate song Jingshan.

If that's the case, there will be a big feud between the two.

It is reasonable to say that song Jingshan should know that there is such an endless contradiction between the two sides, but Han Bin asks again and again, but song Jingshan says that he has not formed a feud with others.

Han Bin picked up the cup to drink tea, but found that the tea in the cup has bottomed out.

Han Bin poured another cup of tea.

Han Bin also has a kind of speculation, whether this can be the killer's cover up.

The target of the murderer is song bochen, and he has also formed a feud with song bochen. However, in order to divert the attention of the police, he will send a threatening letter to song Jingshan. The purpose is to let the police trace the situation around Song Jingshan, thus ignoring the clues around Song bochen.

If so, it means that the killer started planning three months ago, or even earlier

At noon, Han Bin had a meal in the canteen. During the meal, he communicated with Zeng Ping about the case. They were still tracking two licensed cars and had locked the general direction and location, but it would take some time to find the suspected car.

After dinner, Han Bin took a lunch break as usual.

At two o'clock in the afternoon, I washed my face and felt refreshed.

There has been no progress in monitoring. Han Bin is somewhat dissatisfied with their efficiency. In the afternoon, he is also ready to put into the work of verification and monitoring.

"Dong Dong..." There was a knock outside the office.

"Come in."

Lu Wen pushed the door and came in, sighing, "team Han, every time I see you in the office, I feel like a dream."

Han Bin shakes his head and laughs, "what do you find?"

"I dare not go to your door without a clue." Lu Wen handed over a document, "we have checked two envelopes. Only one person's fingerprint was found on the second threatening letter. After comparison, it is song Jingshan's fingerprint.""The fingerprints of four people were found in the first threatening letter, one is song Jingshan's, one is song Bohui's, and the fingerprints of two others. There is no comparison sample for the time being."

Han Bin touched his chin. He had asked song Jingshan before. According to song Jingshan, when he found the first threatening letter, he found song Bohui and his daughter song Boxia. That is to say, in addition to song Jingshan, both song Bohui and song Boxia had read the threatening letter.

The fingerprints of song Jingshan and song Bohui are compared, which also confirms song Jingshan's words, but I don't know whether song Boxia's fingerprints are in the remaining two fingerprints.

Han Bin simply tells Lu Wen about the situation and asks him to go back and wait for the news. Han Bin should first determine whether song Boxia's fingerprints are in the two fingerprints. If so, it can be ruled out for the time being.

In this way, when comparing the database, the workload will be reduced by half, which is also considered for the sake of the technical team.

After Lu Wen left, Han Bin clapped his hands and said to the crowd, "you should have heard what you just said. The technology department found suspicious fingerprints on the first threatening letter, which may be left by the suspect. As long as you find the suspicious person from the monitoring, you can compare the fingerprints. Let's work harder. "

The crowd answered twice.

Han Bin doesn't care about them any more. He calls song Jingshan and asks him to inform his daughter song Boxia to come to Yuhua Branch.

However, song Boxia didn't wait, but Han Bin waited for another guest.

"Ding Ling Ling..." Han Bin's cell phone rings.

"Who is it?"

"Is that Captain Han?"

"It's me, who are you?"

"Are you going to look into the case of the threatening letter again?"

"Yes." Han Bin is a little puzzled.

"I have something I want to respond to you."

"What's the situation?"

People on the other end of the phone hesitated, "I I can't tell you a word or two about it in person. "

"Yes, where are you?"

"I'm at the gate of Yuhua Branch."

Han Bin went to the window and saw a man standing next to the guard room, "you go into the hospital, I'll send someone to pick you up."

"Good."

Hang up the mobile phone, Han Bin to Zhao Ming said hello, let him go downstairs to answer the man who called.

After a while, Zhao Ming led a middle-aged man to come in, wearing a gray T-shirt, head down, looking a little cramped.

"Sit down, please. What do you call it?" Han Bin asked.

"My name is Hong Jianying."

"I think you look familiar. Have we met somewhere?"

"Yes, I work in Rongding Garden community."

"I remember. I saw your picture in the property. You are responsible for cleaning Building 6."

Tian Li handed over a glass of water, and Hong Jianying caught it in both hands. "Yes, you have a good memory."

The other party is the cleaner of No.6 building. He may have seen the person who delivered the threatening letter. Han Bin subconsciously asked, "do you have any clues about the suspect who sent the threatening letter?"

"I..." Hong Jianying swallowed and took a deep breath. "That letter is I did