The 10 o'clock morning sun was pleasant, and Jean stood at the door of a jewelry store, one of the largest decoration stores in District 1, with a large number of small items.

The store, called Pringles, sells a large number of small craft items made of real materials, with a three-storey, nearly 10-meter-long façade with a small door in the middle and glass display windows on both sides.

Jean stood in the display window on the left, looking at the colorful small objects inside, and rubbing coins in his hand, the only store in District 1 that had a license to make small objects out of metal.

There are small bells of various shapes and colors, some small pendants carved into it, ornamental pendants of various styles, and a large number of hollow carved metal objects, the first floor is these small objects, the second floor is a larger object, and the third floor has a lot of hand-painted works.

The price is not low, Jean casually glanced at a palm-sized bronze ornament with a hexagonal center with a hollow pattern, and it cost 136 yuan.

All the surveillance data of the female suspect who killed herself in front of Le Xiao has been investigated, she has not been to the lower level, and the metal may still be available at the lower level, and when the security station reviews and distributes food every month, there will be many small merchants at the bottom to buy some metal objects, which are another source of income for the people in the barrier area, and can exchange a lot of liquid food with the merchants, and the merchants will dissolve these metals and sell them to some jewelry stores that need metal.

In Gene's pocket, there was still a knuckle knife twisted by Quasimodo, and he stepped into it slowly.

It's full of some weird gadgets, and there are a lot of them, and there are a lot of people in the shop, and there are some mechanical clockwork, which will be driven all the time, and Jean looks at it casually, and there are a lot of iron products.

Most of the metal has been modified with density compression, so it is strong, and the finger cutter in Jean's hand is the same, but the grinding marks are more noticeable.

Nowadays, we have the technology to directly reduce all detritures to the original atoms, whether it is metal or stone, it is a permanently recyclable resource.

The store is very large, nearly 20 meters deep, Jean looked at it casually, and many people in the store recognized Jean, and some women leaned over excitedly.

What Jean suspects is that this finger knife is an iron product bought in this store, and then melted it with reduction technology to make a sharp knife, and the purpose of his visit today is to investigate the sales records of the store, whether the suspect has ever come here to buy iron objects.

This is a point that was omitted after the investigation of the 5th Division, and they directly suspected that the rioters had provided the woman and other suspects with criminal tools, but Jean did not think so, because the 13 cases were all independent crimes except for the special case of Zou Lin, judging from the actions of the female suspect who killed herself.

Independent crime is the most difficult to investigate, so now the people in Section 5 will have such a headache, from the criminal methods to the tools of the crime, as well as the independent and complete planning of the criminal process, and the fine nature of the planning, Jean thought of the plan that C131 provided to her to evade surveillance when she contacted Le Xiao before, which was indeed effective, and with the assistance of Luo Han's fat man.

Most of the crimes that are easily solved are committed by at least 2 or more people, because the integrity will definitely be broken because of the cooperation of many people, and even people will betray others in order to protect themselves, this case has no physical evidence, the only woman who knows the situation has died, and the other is a psychopath.

Of the 12 people killed, there were 5 women and 7 men, and the suspects with whom they had close personal relationships have now been locked in 125 people, and among these 125 people, it is difficult to investigate and there has been a certain degree of friction with the deceased.

So Jean decided that this was a premeditated and delicate crime, perhaps started 10 years or more ago, rather than a crime that began to be committed in a short period of time, this kind of crime is easy to expose, and time is the biggest accomplice in this crime.

"Oh, Master Jean, is there anything you like? We still have a lot of stuff in the store. ”

At this time, a man wearing gold-rimmed glasses walked over, smiling flatteringly, Jean took out the twisted finger knife, and in an instant the boss's face became solemn.

"Lord Jean, we don't sell this kind of ....... in our store."

Jean smiled and nudged his boss on the shoulder and patted him.

"It's okay, I'm just here today to ask."

After a while, the boss took Jean to his office, pulled up a light screen, typed in the name of the female suspect, and began to search through the huge store database, but to no avail.

"Lord Jean, every metal object we sell will have strict and detailed customer records, and it can be checked, and we will never sell things privately, after all, ......"

Jean said as he put the knuckle knife on the table, stood up, and said.

"Check it out for me, I want all the official and informal metalsmiths in District 1."

The boss lowered his head in embarrassment, and his eyes showed fear.

"As the first gold digger in the upper echelons, your store has been open for 20 years, and there should be both black and white lists, I just want to ask you for a small favor."

The boss nodded, put away the knuckle knife, he understood what Jean meant, to find out who processed this knuckle knife, this kind of sharpened knife, ordinary people can't make it, you must have a professional craftsman.

Jean stood up, walked to the office door, tilted his head, and said.

"Call me when you find it."

The boss smiled and nodded, but at this time his heart was painful, after Jean left, he was a little difficult to sit still, nearly a third of his shop is illegally obtained metal, and it is indeed closely related to many officially licensed craftsmen and those who do not have formal licenses, two-thirds of the crafts in the store are processed by those black craftsmen, because they have no license, they are not qualified to process, but the price is low, usually processed at home, and those formal craftsmen cooperate, It's just to do a good job of accounting and hide people's eyes.

In the past, there were many such shops in the upper floor, but in the end, they were eliminated one by one under the strategy of this shrewd boss named Morse, who first co-opted a large number of designers in the art district, and then tied them up with benefits, so that they could not provide creative design drawings to other stores, and began to report and suppress other shops, because they more or less cooperated with black craftsmen, as a result, many shops eventually closed due to the inability to support the expensive houses.

But at this moment, Morse is afraid, this knife is obviously an absolute controlled substance, and thinking of the previous murder case, Morse is very clear, although a few days ago Section 5 claimed that this was a case caused by drugs, Morse, who is well versed in this, knows that this is just the rhetoric of the department, and today Jean personally investigated, he knows better that it is not a simple case, it may be related to rioters, once he is involved, it will be over.

"Those damn guys, who the hell is involved?"