Chapter 464 Unfamiliar Fingerprints

Regarding the background investigation information of Han Long and Qin Lu, Zhang Chaoyang did a relatively detailed job.

Han Long doesn't have any enemies in Yinglu City. The foreign trade companies he founded were all completed with the support of his former father-in-law Qin Jun. Moreover, from what I know so far, Han Long is a well-rounded person, very smart and never quarrelsome. A blushing person, let alone an enemy.

In fact, not only did Han Long have no enemies, he also had few real friends in Yinglu City.

After all, Han Long had only stayed in Yinglu City for five years. Except for Qin Lu's family, he only knew people from foreign trade companies.

Qin Lu...

Sitting in the office, Chen Yan was carefully thinking about every detail of the interrogation of Qin Lu.

During the interrogation, Qin Lu's impression of Chen Yan was completely different from the results of Zhang Chaoyang's investigation.

When they were studying at the police academy, Chen Yan's teacher once taught them that when handling a case, they should not bring their own personal feelings and subjective assumptions at any time.

All inferences and guesses must be based on the clues that have been discovered.

At that time, no one understood why the teacher said this.

It wasn't until Chen Yan had handled more than 30 cases that he understood the true meaning of the teacher's teachings.

Logic is important in investigating any case, but it is not the most important.

Because many cases in reality do not follow logic.

Every murderer has a variety of reasons for killing.

Everyone has many sides, not as good as Qin Lu.

When Chen Yan first saw Qin Lu, who had disabled legs and was sitting in a wheelchair, in the interrogation room, he would naturally place her on the weak side in his heart.

In fact, Qin Lu took advantage of this and concealed some facts during the interrogation process.

For example, how her legs were broken.

For example, how she treated Han Long after marriage.

As a result, after the entire interrogation, Han Long was labeled as ungrateful.

When a wage earner had nothing, he fell in love with the daughter of his company boss.

Then after he became successful in his career, he ruthlessly abandoned his wife who was disabled in both legs.

Turn around and live happily with your childhood sweetheart.

But in fact, Qin Lu's disabled legs were caused by jealousy with other women.

After she married Han Long, she was still fooling around.

He even often beat and scolded Han Long.

The reason for their divorce was not due to one party.

Boom, boom, boom.

A knock on the door interrupted Chen Yan's thinking: "Please come in."

It was Liu Qingshan: "Chen Yan, we have almost found clues about the delivery man and the restaurant."

"oh?"

"Let's go to the conference room."

Liu Qingshan began to report the investigation results.

"Through the support provided by the food delivery platform, we found all the food delivery orders placed by Hanlong's mobile phone account."

On the screen was a compiled summary: "Han Long's mobile phone account was started five years ago, and his first takeout order was three and a half years ago."

"Everyone, please see, these are all the orders of braised lion heads that Han Long has placed."

The table on the screen has a total of 46 order numbers.

"Since Han Long used this mobile phone number to order takeout, he has ordered a total of 46 braised lion heads."

"The first braised lion head order was on September 28, four years ago."

"Han Long placed the first ten orders at different restaurants."

"However, from the sixth order to the last order of Lion's Head, Han Long ordered everything from Hongyun Sichuan Restaurant."

On the projection, there is a photo of the front door of Hongyun Sichuan Restaurant.

"Judging from the number of takeout orders, Han Long himself probably prefers braised lion heads."

"Furthermore, after the sixth takeout order, the lion head takeout ordered by Han Long was all from Hongyun Sichuan Restaurant, which means that after eating the braised lion head from this Sichuan restaurant, Han Long should have found it more delicious, so he ordered later All the takeaways are from this Sichuan restaurant.”

"Let's take a look at the time distribution of Han Long ordering this takeaway."

"46 portions of braised lion head, the average time interval for the first 26 portions is one portion a month."

"But starting from the takeout order at 11:28 pm on May 1, the frequency of ordering takeout has become almost once every three days."

"This time should be relatively close to the time when the deceased was murdered, so we conducted a detailed investigation on the 20 takeaways after the night of May 1."

"The delivery guys who delivered the food were all dispatched by the system immediately. A total of 14 people took this take-out order."

"The most a delivery person ever did was take three orders."

The main basis for food delivery platforms to dispatch orders is distance.

Within the effective distance, the platform will give priority to the delivery person closest to the seller's location.

Then wait for the other party to take the order.

If the delivery person is available and confirms taking the order, the order process ends with the delivery person.

As for the seller, there is another ordering process. When the buyer places the order, the seller will receive a notification from the system and can directly make the order. The delivery person will come to pick up the meal.

The delivery service has a certain scope, which is probably one or two blocks. Some delivery people will stay near the popular restaurant streets or in front of a certain store, waiting for the takeaway order from this store.

So there will be situations where someone sends orders continuously.

"Except for one of these 14 people, who resigned last week, we have not been contacted yet. The others have been contacted one after another."

"The owner of Hongyun Sichuan Restaurant has also been summoned."

"What's the specific result?"

Lan Feng had roughly reported the relevant situation to Chen Yan based on the video investigation, but it was not as detailed as Liu Qingshan's.

"We have completed the fingerprint information collection and comparison of the 36 packaging boxes found on Han Long's dining table."

"The result...is a little strange."

Um?

"Did you find any problem?"

Liu Qingshan nodded: "There are indeed some problems."

“The first thing is the shape of the takeaway box.”

"Of the 36 take-out boxes on Han Long's dining table, 20 are from Hongyun Sichuan Restaurant and have the logo of Hongyun Sichuan Restaurant on them."

"The other 16 had no marks on them. It was in these 16 unmarked packaging boxes that we detected Zhang Yao's tissue DNA information."

"But the appearance of these 36 boxes is exactly the same. The only difference is the logo of Hongyun Sichuan Restaurant."

"That means these boxes are all of the same type."

"I sent someone to the market to see it. There are many types of packaging boxes on the market."

"The style of the packaging box used by the murderer is exactly the same as that of Hongyun Sichuan Restaurant. Is this a coincidence?"

"Also, among the fingerprints we extracted on the packaging boxes, the fingerprints on the packaging boxes from Hongyun Sichuan Restaurant can be matched with the delivery people and restaurant packagers."

"But we also found another type of fingerprint."

“It’s on all the takeout boxes, but it doesn’t match the packagers, takeaways, etc. in Sichuan restaurants.”

"Can't even match?"

Chen Yan looked at the fingerprints on the screen and frowned slightly.

"Is it possible that it was left by the murderer?"

Hu Xueying guessed.

Chen Yan shook his head: "This possibility is relatively small."

"The murderer was very cautious throughout the entire process and did not leave any clues in Han Long's home."

"Leave your fingerprints on the packing box...the murderer would not make such a stupid mistake."

"Well, Qingshan, let's check the origin of these packing boxes."

"In addition to coming into contact with takeaways and packagers from Hongyun Sichuan Restaurant when the packaging boxes are in use, they may also be exposed to others during the production or transportation process."

"Check where Hongyun Sichuan Restaurant gets these takeout boxes."

"Also, collect the fingerprint information of all the people in the Sichuan restaurant for comparison!"

"yes!"

This is an important clue.

As Liu Qingshan initially analyzed, there are many types of packaging boxes on the market. Why is the shape of the packaging box used by the murderer the same as that used by Hongyun Sichuan Restaurant?

Is it a coincidence or are there other reasons?

Moreover, there was only one unfamiliar fingerprint collected on the packaging box.

What does this mean?

This shows that if this fingerprint is not left by the murderer, it can also prove one thing.

The packaging box used by the murderer is not only exactly the same as the packaging box used by Hongyun Sichuan Restaurant, but it is also very likely that it comes from the same purchasing channel!

****************

"How is the investigation of the origin of the large grain of salt?"

After killing Han Long, the murderer removed all his flesh and blood and then marinated it in a jar with large grains of salt.

This effectively handles the smell of decaying corpses.

It is also the most important reason why neighbors did not notice any abnormalities.

But Liu Qingshan shook his head: "The investigation in this area is progressing very slowly."

"We have conducted a survey of several large supermarkets in Yinglu City, and every one of them sells this kind of large grain salt."

"Although there are not many people buying in this season, outside of large supermarkets, there are more sales in some small supermarkets in the urban-rural fringe area."

"In large supermarkets, we can find the sales of large grain salt based on sales records, but in small supermarkets in the urban-rural fringe area, there is no way to check."

"Where's the oil wax?"

"The murderer used oil wax to seal Han Long's head to prevent it from rotting. The sales of this kind of thing should be relatively small. Has the source of the sales been found?"

"There are some clues in this regard."

It turns out that although the oil wax used by the murderer is relatively special, it is very common here in Yinglu City.

"The oil wax used by the murderer is a material used to make oil wax toys."

On the screen was a photo of a wax-sealed sand table.

"It turns out to be this thing, I've seen it before!"

Hu Xueying saw the photos played by Liu Qingshan and suddenly said: "There are toy stalls like this in shopping malls or on the roadside."

"It's a wax toy that children play with."

"Yes, it's this kind of thing. I've also played with my children."

"It turned out to be this kind of thing. I took my children to play with this on the roadside last week."

Many detectives from the Yinglu City Detective Team agreed.

It turns out that this is a toy solidified oil wax.

Generally, some sea sand and some small dolls are placed in the glass bottle, and then sealed with this highly transparent oil wax.

It's like solidifying in transparent water when you go there right away. It's easy to see and easy to operate.

Children can operate it by themselves, and the temperature of the oil and wax is not high, so there is no need to worry about burns.

"We checked and found that this kind of low-temperature oil wax with high transparency can be purchased in several wholesale markets in Yinglu City."

"There are many people buying and the sales are relatively large, so it is difficult to trace them."

Large grains of salt, oil wax...

These two clues are basically broken.

Now, there is only one clue left, that strange fingerprint.

After it was over, Chen Yan came to the monitoring room.

In the surveillance room, Lan Feng was interrogating the owner of Hongyun Sichuan Restaurant.

"Han Long?"

"I don't know you. There are hundreds of people eating in our hotel every day. I can recognize you everywhere."

The owner of Hongyun Sichuan Restaurant is Zhang Xu, a native of Sichuan Province, who has been in Yinglu City for ten years.

In the early years, I set up a street stall in Yinglu City. Because I was good at cooking, it gradually became bigger. After making some money, I opened Hongyun Sichuan Restaurant.

Business has been good in the past few years and I have made a lot of money. I bought a house in Yinglu City and settled down.

Since Zhang Xu had no impression of Han Long's name, Lan Feng took out Han Long's photo.

"This is the person, do you have any impression?"

Zhang Xu hadn't taken the photo yet, and the expression on his face suddenly dawned: "You are talking about this person, I have an impression of this person."

"This man is a regular customer of our hotel. He often goes to our hotel to eat, but we are all acquaintances. I didn't know his name was Han Long."

"Judging from his accent, he is also from Sichuan Province. He seems to be here to do business. The business should be pretty good. I think the car he drives is pretty good. He used to come here basically every week, but these two days It seems that the month has disappeared, and I haven’t seen him for a while.”

"Did something happen to him?"

"Let me tell you, comrade police, I really don't know him. He often comes to my restaurant to eat, but I really haven't seen him in the past two months."

"Is he familiar with anyone in our hotel?"

"familiar?"

Zhang Xu shook his head: "He came here from Sichuan Province to do business. He must be doing well. If he wants to eat local food, he just nods to us. He definitely doesn't know our people."

"Oh, by the way, when he came here before, he often brought a woman with him."

Lan Feng took out Zhang Yao's photo: "Is he this person?"

"Yes, yes, that's the woman."

"Are you sure no one in your hotel knows this Han Long?"

"Definitely not. If there is, I will definitely give him a discount."

"Have your hotel employees seen anything unusual lately?"

"There is nothing unusual about us. Those who open restaurants earn hard-earned money. They get up early and come home late."

"The people who work in my restaurant are all from my hometown. The longest one has been there for three years and the shortest one has been there for more than a year. They are all familiar people who know everything about me."

"Except for the fact that I fired a cook named Wang Hongfei in our store some time ago, everyone else is doing a solid job here."

"Expelled?"

"Well, he also came to work from Sichuan Province, but he was introduced by others. He worked for me for three months. I thought this guy was quite down-to-earth, but it turned out that his hands and feet were dirty."

"I stole a lot of things from the kitchen. About three months ago, I discovered it. I thought it was a fellow villager, so I didn't call the police, and then I fired him."

In addition to the manager of Hongyun Sichuan Restaurant, Lan Feng also interrogated the waiters and chefs of the Sichuan Restaurant, and there was no discrepancy with the information provided by Zhang Xu.

Han Long had interactions with Sichuan restaurants during his lifetime, but only for meals.

But the murderer obviously knew that Han Long liked to eat the braised lion head in this Sichuan restaurant.

So what is the connection between this man and Han Long?

There is also Zhang Yao, who is likely to have been killed.

So far, only some flesh and blood tissue of Zhang Yao has been found, but no other parts of the body such as the skeleton have been found.

Everything Zhang Yao used in Han Long's house has also disappeared. Why did the murderer do this?

After walking out of the monitoring room, Chen Yan called Li Hong directly.

Han Long was killed, Zhang Yao was killed, and all Zhang Yao's belongings in Han Long's house disappeared. There must be a very important connection here.

Chen Yan decided to investigate from the root cause.

For example, when Zhang Yao ran away from home, it was because her parents made the decision about her marriage.

So why did Zhang Yao disagree with the marriage arranged by her parents?

Also, Zhang Yao went straight to Yinglu City to join Han Long after leaving home.

These two people had a close relationship when they were in the village.

Otherwise, why would Zhang Yao come to join Han Long?

What is the relationship between them?

And Han Long's ex-wife Qin Lu, when she was being interrogated by Chen Yan, did she deliberately conceal the information just to preserve her image in front of outsiders?

Or is there some other purpose.

Judging from the results of Zhang Chaoyang's investigation, Qin Lu is not a fuel-efficient lamp.

As a result, she allowed Han Long to cheat and then simply divorced?

Something's wrong!

There must be some secret here that Chen Yan and others haven't discovered yet.

Li Hong put down Chen Yan's phone number and sent a direct investigation letter to the Sichuan Provincial Detective Team.

In fact, this Dongxiyinglu City Detective Team can also issue it.

However, Yinglu City can only issue a letter of assistance to the municipal detective team where Han Long's hometown is located, and because it is across a province, it needs approval from the Liao Provincial Detective Brigade, and only after approval can the letter be sent.

After receiving the information, they also asked the Sichuan Provincial Detective Brigade for instructions. Only with approval can they start the joint investigation work.

In this way, it won't be done in two or three days.

Sending this letter through Li Hong is different.

The Sichuan Provincial Detective Brigade will receive the letter as soon as possible and then forward it directly to the local detective team in Han Long's hometown. The investigation results will even be fed back as soon as tomorrow.

I’m asking for votes on November 1 and recommend a new book by a female video guru! !