Detective from the future

Chapter 767 Unexpected visitor
Han Bin asked the property management company for a list and contact information of the owners of Building No. [-], which will be useful when checking and monitoring.

As for the express cabinets in Building No. [-], there is a gap above each cabinet, which is specially used to deliver letters. The possibility of leaving DNA and fingerprints is very small, and even if there are, they may not belong to the murderer.

After Li Qin and Bao Xing copied the monitoring, the scene was basically surveyed, and Han Bin took people back to the Yuhua branch.

After Han Bin returned to the office, he found that Li Hui had already returned from the Huaguang Police Station, "You are fast."

Li Hui said, "I'll be back after handing over to the comrades at the police station."

Han Bin yawned and sat on the chair, "What clues do they have?"

"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 document in front of Han Bin, "This is the dossier at that time. Song Jingshan's record contains their investigation process."

Han Bin flipped through the file, and Song Jingshan's transcript was roughly the same as today's transcript.

However, there was a note that caught Han Bin's attention. According to Song Jingshan's account, he found that there were more letters in the express cabinet on the morning of June [-], and the last time he checked the express cabinet was the morning of June [-], which means that the last time The time of committing the crime was between June [-]th and June [-]th.

Before taking notes, Han Bin also asked about the situation of the first threatening letter and the exact time, but Song Jingshan only remembered that it was reported to the police on June 10, and the last time he checked the courier cabinet for the threatening letter he found. I can't remember the time.

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

Han Bin threw the dossier on the table, glanced at the crowd, and said, "Don't say anything, check the monitoring."

"Not only do we need to check the monitoring of the last five days, but we also need to check the monitoring of June 8, June 9, and June 10. We also need to compare the surveillance video of the first threatening letter with the second threatening letter. Find the common characteristics of the suspects."

"Yes." Everyone split up.

Not long after, Du Qi also came back from the communication company. He was in charge of investigating the call records of 'Brother Zhao' to see if he could find clues about Brother Zhao from the contacts.

After Du Qi reported to Han Bin, Han Bin asked him to check with Mai Jun.

It's also a tedious job.

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

This threatening letter may seem 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.

宋景山是九月6号出差的，也就是说6号、7号、8号、9号这四天，嫌疑人都有可能投递恐吓信，而宋博晨是九月9号下午死的。

The murderer probably sent the threatening letter first, and then killed Song Jingshan's son Song Bochen out of revenge.

Song Bochen's death also coincided with the sentence of family ruin and death.

However, if the murderer has already decided to kill, what is the point of his threatening letter?
Could it be to remind Song Jingshan?This doesn't make sense.

Of course, there is another possibility that the murderer delivered the threatening letter after killing someone, with the purpose of stimulating Song Jingshan.

If this is the case, the enmity between the two people can be great.

It stands to reason that Song Jingshan should know that there is such an endless conflict between the two sides, but Han Bin asked repeatedly, but Song Jingshan said that he had no feud with anyone.

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

Han Bin poured another cup of tea.

Han Bin also had another guess, whether this was a cover-up by the murderer.

The murderer's target was Song Bochen, who had also become enemies with Song Bochen, but in order to divert the attention of the police, he sent a threatening letter to Song Jingshan. The purpose was to let the police track down the situation around Song Jingshan, thus ignoring the clues around Song Bochen.

If this is the case, it means that the murderer started planning three months ago, or even earlier...

At noon, Han Bin ate in the cafeteria. During the meal, he discussed the case with Zeng Ping. They were still tracking the two licensed vehicles and had already locked the general direction and location. It just took a while to find the suspect vehicle.

After the meal, Han Bin took a lunch break as usual.

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

There has been no progress in monitoring. Han Bin is somewhat dissatisfied with their efficiency. In the afternoon, he is also going to invest in inspection and monitoring work.

"Dong dong..." There was a knock on the door outside the office.

"Come in."

Lu Wen opened the door and walked in, and said with emotion, "Captain Han, every time I see you in the office, I feel like a dream."

Han Bin shook his head and laughed, "Did you find anything?"

"I don't have any clues, and I dare not go to your door." Lu Wen handed over a document, "We have already checked the two envelopes, and only one person's fingerprint was found on the second threatening letter. That's right, Song Jingshan's fingerprints."

"The fingerprints of four people were found on the first threatening letter. One was Song Jingshan, the other was Song Bohui, and the other two fingerprints. There are no comparison samples for the time being."

Han Bin touched his chin. He 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, apart from Song Jingshan, both Song Bohui and Song Boxia read it. through this threatening letter.

The fingerprints of Song Jingshan and Song Bohui were compared, which also confirmed Song Jingshan's words, but it is not known whether there are Song Boxia's fingerprints among the remaining two fingerprints.

Han Bin briefly explained the situation to Lu Wen, and asked him to go back and wait for news. Han Bin had to first confirm whether there were Song Boxia's fingerprints among the two fingerprints, and if so, he could temporarily exclude them.

In this way, when comparing the database, the workload will be reduced by half, which can be considered as a consideration for the technical team.

After Lu Wen left, Han Bin slapped his hands and said to everyone, "You should have heard what you said just now. The technical department found suspicious fingerprints on the first threatening letter, which are probably left by the suspect." , as long as you find a suspicious person from the surveillance, you can compare the fingerprints. Work harder, everyone."

The crowd responded sparsely twice.

Han Bin ignored them and called Song Jingshan, asking him to inform his daughter Song Boxia to come to the Yuhua branch.

However, Song Boxia did not wait, but Han Bin waited for another guest.

"Dingling..." Han Bin's cell phone rang.

"Which one?"

"Excuse me, is this Captain Han?"

"It's me, who are you?"

"Are you going to investigate the threatening letter again?"

"Yes." Han Bin was a little puzzled.

"I have some situations that I want to respond to you."

"what's the situation?"

The person on the other end of the phone hesitated, "I...can I tell you in person, I can't explain this matter clearly."

"Okay, where are you?"

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

Han Bin walked to the window and saw a man standing by the guard room, "Go into the courtyard, I'll send someone to pick you up."

"it is good."

After hanging up the phone, Han Bin greeted Zhao Ming and asked him to go downstairs to answer the man on the phone.

After a while, Zhao Ming led a middle-aged man in, wearing a gray T-shirt, with his head bowed, looking a bit cramped.

"Please sit down, what's your name?" Han Bin asked.

"My surname is Hong, and my name is Hong Jianying."

"I think you look familiar, have we met somewhere?"

"Yes, I work in the property of Rongding Garden Community."

"I remembered. I saw your photo in the property. You are in charge of cleaning Building No. [-]."

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

The other party was a cleaner in Building No. [-], and he might have seen the person who delivered the threatening letter. Han Bin asked subconsciously, "Do you have any clues about the suspect who sent the threatening letter?"

"I..." Hong Jianying swallowed and took a deep breath, "That letter was...I voted for it!"

(End of this chapter)