Chapter 430: Upgrade

"Doing it according to an ordinary murder case, is the murder target the victim?" Captain Han asked, still cooperating with Liu Liu Jinghui to hold the stage, and at the same time, he asked a key question.

If the target of the murder is the victim, then there must be a motive. If not... then who is it.

This question is actually not easy to answer. Liu Liu Jinghui recalled the case files he had read and pondered: "The victim is a local, 30-something, who opened a motorcycle repair shop himself. There is only a cousin helping in the shop. His wife brings the children, occasionally comes to help collect money, and organize the shop. All indicate that he didn't offend anyone."

Captain Han listened silently. Just from this paragraph, it can be seen that when Liu Liu Jinghui said "excluding everything impossible," he was really not talking nonsense in a hurry. He had indeed considered this problem.

If the victim is the target, then everything is well explained. The killer achieved his goal, so naturally, there is no need to continue exploding. Placing the explosive at the station was also the only way from the motorcycle repair shop to the victim's home.

Liu Liu Jinghui listed several possibilities and said: "The investigation in the past few days also didn't waste time. We proved that no similar explosions have occurred in the past few years, and the same type of gunpowder hasn't appeared again. This can corroborate the point that the killer's purpose was achieved."

Liu Liu Jinghui said slightly excitedly. Captain Han's face couldn't show any emotion.

"Old Han, what do you say?" Liu Liu Jinghui needed some feedback.

Captain Han said slowly: "If the victim is the target, it was actually investigated. There is no motive. The victim's wife doesn't have relevant technical background, the relationship between the two is harmonious, and there is no impulse to kill her husband in terms of economy. The two had children for less than two years at that time. The victim's cousin is also like this. He was originally learning technology, and he would have been out of apprenticeship in half a year. This time he returned to the countryside and had to start over."

"What about the motorcycle shop itself?"

"The motorcycle shop 8 years ago is not the motorcycle shop 18 years ago. It was a small workshop, mainly repairing cars, earning hard money and manual money. After the victim's motorcycle shop closed, it closed. The landlord also suffered a loss, and the house was rented for a long time before it was rented out. No similar shop opened nearby."

"Maybe it opened as a car repair shop." Mu Mu Zhiyang said.

"That's right, opening a car repair shop actually doesn't cost much more than a motorcycle repair shop."

"Maybe it's a deeper level of emotion." Liu Liu Jinghui guessed.

Emotion and interest are the factors that most easily produce disputes and are also the factors that most easily manufacture homicide cases. A cold knowledge, although modern people always feel that human feelings are indifferent and the world looks at money, with economic development and the increase in per capita income, the main reason for Chinese people to kill has long shifted from seeking wealth to emotional entanglements.

At least in terms of killing, everyone still values feelings and righteousness over money, which is called having feelings and righteousness.

Captain Han looked at the A4 paper list at hand. Now there is no direction, so he can only follow Liu Liu Jinghui's guess, but...

"Do you want to investigate according to the motive?" Captain Han asked: "Actually, it has been checked carefully once. Including the victim's relationship in Qu'an County, the relationship in the old home in the countryside..."

"I think it can be like this." Liu Liu Jinghui's gaze looked at Jiang Yuan and said: "If we collect the footprints of all the victim's relationships, can we compare them with the footprints at the scene?"

Jiang Yuan nodded without hesitation: "That's no problem."

This is not too difficult. The only problem is that there are too many footprints at the scene.

However, Jiang Yuan also immediately understood Liu Liu Jinghui's train of thought. Explosion cases are different from ordinary passionate murder cases. They are carefully arranged.

Therefore, the time the killer stayed near the explosion scene definitely wouldn't be short. Leaving footprints is very possible. Even if he wears foot covers, etc., it can still be easily seen—of course, there are no such obvious camouflage footprints at the scene, but if you comb through all the footprints at the scene, considering the radius of 20 meters from the explosion center, it is a bus station with people coming and going.

, the number of footprints involved is estimated to be very large, but it is indeed one of the feasible choices. Of course, this kind of many-to-many footprint comparison is still very challenging.

The previous special case team didn't adopt this plan, which was likely because it couldn't be realized. Many-to-one is relatively easy to do, but many-to-many, very many to very many, it is a bit difficult to ensure the success rate, even for Jiang Yuan, it is the same.

The lv3 footprint identification estimate is not enough.

Jiang Yuan thought of the Second-Class Merit he just obtained.

Exchanging for an explosion-related skill, Jiang Yuan felt it was meaningless. Such cases are encountered too rarely. Even if he runs all over the country, he estimates he will bump into various experts.

But footprint skills are different.

Jiang Yuan called out the system and upgraded the footprint analysis skill on the spot—Footprint Analysis (lv5)

Because it is a relatively small item, the upgraded level is still very high. At the lv5 level, it is not just first-class, at least it is the top level in the country, and very few people can reach it.

Jiang Yuan upgraded this skill without any burden. Footprints are used too much. Even if this case can't be used, upgrading it is not a waste.

"I need to find a few more computers, monitors..." Jiang Yuan hadn't done this scale of many-to-many, and also tried to make requests.

Captain Han naturally agreed with all his strength. The meat was fed, and there was no need to be stingy about serving a bowl of soup.

Liu Liu Jinghui was a bit happy. This is an important moment to verify his train of thought. The "truth is only one" reasoning in his reasoning career actually hadn't been realized much.

Most criminals don't need this move

Most criminals would be finished without ever needing this tactic. The stories imagined by mystery writers are mostly built on the premise of perfection, but in reality, unless a case is particularly simple, the more complex the case, the greater the possibility of leaving traces behind.

Like the current case, this line of thinking can also be used to analyze it.

If it were a bombing targeting an unspecified number of people, the killer could just drop the explosive and leave. This case is a social-defying bombing that used sophisticated explosives but was executed crudely.

But if it is converted into a murder case, this case becomes a sophisticated bombing murder that utilized sophisticated explosives and sophisticated time calculations.

In this way, the time the killer spent in the vicinity wouldn't be short either. It's basically impossible that they just arrived in the vicinity, dropped the explosive, and left; they would have had to calculate things, and perhaps even wait in advance, observe, and so on.

The four of them seemed a bit more energized. Captain Han immediately picked up the phone, his eyes red-rimmed, and began arranging for people to send over more computers and monitors—and, of course, the personnel who could install them.

By the time it was past 9 o'clock, a conference room next door had been cleared out, and a vast number of monitors, as well as computers and printers, were installed.

"Keep a few of the computer people, and then organize these footprints, number them, and absolutely do not leave any out." Jiang Yuan also pulled in the members of his own team.

Wang Wang Chuanxing and the others were all young criminal police officers with high academic qualifications. At this moment, they gathered together and began to lay out the footprints extracted from the scene.

The special task force during the initial investigation of the case had already organized the footprints once. The footprints they pulled out that could be used for identification numbered in the thousands, belonging to over 4,000 people.

Among them were footprints within the blast radius, footprints in the outer circle of the blast area, and some relatively clear footprints at the station's entrances and exits.

As for the footprints of the victims' relatives, they had collected a few at the time, mainly those of the victims themselves, the victims' wives and the subordinates who helped out, as well as the victims' own direct relatives, a few village neighbors, and a few well-known village thugs.

The special task force at the time, limited by technical reasons, was essentially fighting a "few against many" battle, and their line of thinking was similar to Liu Liu Jinghui's.

This shows that the special task force at the time also had the idea of "belling the cat," but the probability was that the working ability of the "mice" executing it wasn't up to par.

Jiang Yuan's level 5 skill, placed in the world of mice, would have to be at the level of a congenital mouse.

Belling the cat is certainly difficult, but

it's not entirely impossible.

Captain Han even specifically sent a team of people to go and collect the footprints of various relatives, friends, and stakeholders around the victims.

Come to think of it, these criminal police officers actually didn't know the trade. Footprints, unlike fingerprints, change as a person changes. There are parts that don't change, but there are more parts that do.

But since they didn't know, they wouldn't ask too many questions.

Jiang Yuan knew the trade, but he had just attained the level 5 skill and was in a time of great confidence; instead, he was quite sure he could identify footprints that had weathered eight years.

Vaguely, the matter of letting the mice bell the cat was almost turning into letting the mice impregnate the cat, but the mice executing it didn't make a sound, so the other mice naturally had no way of knowing.

Another two busy days passed. Just as Jiang Yuan had adapted to the level 5 footprint analysis, a senior police officer from the provincial bureau quietly arrived in Qu'an County.

Qiu Yue—the very person in charge of the previous Qu'an Station bombing special task force.