Chapter 793

In just one day, the laboratory found the murder weapon from the 68 hoes collected.

This is also a major feature of rural cases. The motive of the case may be confusing, but the anti-reconnaissance means of the villagers are also lackluster.

This family even just cleaned the hoe, let alone discarding the hoe, the bamboo handle was not changed. Not only that, they also stored the hoe in the warehouse. When every family had to take out the hoe, the neighbor pointed out: Didn't your family buy a hoe again?

This hoe was heavily marked by Lei Xin and sent to the laboratory, where it was matched for the first time.

"The killer is equivalent to the deceased's cousin, and the root cause is the grave land problem of the two families..." Lei Xin introduced two sentences, and then felt chaotic himself, shook his head, and said: "In short, it's all old sesame and rotten grain things. According to the killer's confession, the two were talking in the backyard at the time. Because of the canal repair, they had a quarrel and then started fighting."

Lei Xin then detailed part of the situation, spread his hands and said: "If you want to find clues from the motive, a lifetime is not enough."

"It means that if this family handles that hoe well, this case will be difficult to talk about." Wang Chuanxing sat on the side knocking on the computer, and couldn't help asking when he heard this.

Liu Jinghui shook his head: "That's not the case. As long as it is determined what the murder weapon is, it is not difficult to ask whose hoe is missing."

"This is true. In the village, there are not many secrets that can be hidden. This time, the killer's neighbor also contributed." Lei Xin was from the countryside himself. When he said this, he couldn't help shaking his head and said: "The two families also fought over building a house, and also fought over repairing water canals. There are also disputes over grave land. It's just that it didn't evolve into a criminal case."

"Heard a lot of gossip, right?" Liu Jinghui asked with a smile.

Lei Xin sighed: "More than gossip, seeing us catch people, there are those who plead for mercy, and there are those who talk about dark history in private..."

"At least this case can be considered over." Jiang Yuan was from Jiang Village. When he ate from a hundred families when he was a child, everyone had more sympathy for him. After growing up, the village as a whole became rich. It cannot be said that there were no dirty things, but everyone didn't have to just stare at the people in the village to pit them. Plus, he went to other places to study, so his impression of the village was actually better.

Lei Xin saw that Jiang Yuan didn't like this topic, quickly wiped his face, and smiled: "Right, the case is finally over. Oh my, such a big murder cold case, in previous years, it would take three months to solve, and the whole bureau would have to drink wedding wine. This time it's equivalent to just three or four days!"

As Lei Xin talked, he felt emotional himself.

The Ministry has specially invited criminal investigation experts. The first batch of nine people are called the Eight Tigers of Criminal Investigation, which can be said to be famous, and have participated in many major cases in China. Many of these cases cannot be told as stories because the mysterious components are too large.

And after the first batch of nine specially invited criminal investigation experts, the Ministry added eight more in 2003. So far, there are 22 specially invited criminal investigation experts, and another 350 criminal technology experts, etc. Speaking of which, everyone is the type who flies across the country and solves cases.

Lei Xin himself has been in contact with several of them. Although they were all just touching the surface, he felt that Jiang Yuan's efficiency and ability were not inferior to these famous experts.

Of course, the experts are also very efficient. Criminal investigation experts rarely die on a case. It is just a few days. If the opinions put forward can bring breakthroughs, the case will be ended. If they cannot break through... in fact, most of them can get breakthroughs.

Especially criminal investigation experts mainly target current cases. Ordinary criminals, in terms of crime, are equivalent to little virgins who have just entered the love scene. No matter what awesome moves or strange postures their fantasies have, in the eyes of old experts who have solved hundreds of cases on average every year and have been fighting for 20 or 30 years, they are easily handled.

So it's like little virgins who have just entered the love scene shouldn't provoke experienced old perverts. Ordinary criminals had better not commit any vicious crimes, so as not to attract the attention of high-level criminal investigation experts, and then have enough luck to avoid being generally cracked down on by criminal investigation geniuses like Jiang Yuan who are young and motivated. Only then can they truly enter the ordinary level track and walk the same confrontation road with those criminal police officers who are not talented but have been working on the front line of criminal investigation for seven or eight years, ten or twenty years.

"With Team Leader Jiang here, the day when our Qinghe City returns to peace and prosperity is not far away!" Lei Xin's emotions were up, and he racked his brains to praise Jiang Yuan fiercely.

Jiang Yuan only took three days to save himself and the hundred or so people in the team for months, or even longer. Lei Xin really felt refreshed.

Liu Jinghui clicked his tongue twice and said: "The word peace and prosperity doesn't sound like something you, Captain Lei, would say."

"Can't imagine that I, a big rough man, speak so elegantly." Lei Xin laughed and said: "My wife graduated from Changyang University, and it's easy to be brainwashed."

Liu Jinghui's face turned black: "Don't say things that are easy to destroy unity."

Lei Xin laughed so happily that the resentment accumulated due to family chores on weekdays disappeared completely.

Turning around, Lei Xin's deputy poured water for the tea in front of Jiang Yuan and smiled: "Team Leader Jiang, are you planning to rest for a day today?"

"I plan to roast a steak today, but you may have to continue to be busy for a while." Jiang Yuan drank tea and smiled as he said.

Lei Xin was stunned, then realized, and hurriedly said: "Are you planning to start a new case immediately? That's great..."

"En, it was when you were busy with this hoe two days ago, I dug it out." Jiang Yuan turned around and picked up a box, saying: "This case is actually quite old. I see it has been six years. A male corpse wrapped in plastic was abandoned in the Tai River. The task force at that time was..."

"411 Task Force." The cold cases here in Lei Xin have numbers. As soon as Jiang Yuan said six years, he knew which case it was, and said: "At that time, just after Qingming Festival, the corpse was fished out of the Tai River here. The May Day behind was wasted, oh... it's a pity that the case was not solved."

"En, there are a few details about this case that I think can be paid attention to." Jiang Yuan paused, took out the file, flipped through a few pages, and said: "The wrapping material of the corpse in this case was bundled with white nylon rope, white semi-transparent plastic cloth. In addition, the other end of the nylon rope was connected to a green nylon rope with a diameter of 1 cm. There are also two types of plastic cloth on the outside of the corpse, one new and one old. It can be seen that these things were done in a hurry and didn't look like they were prepared in advance."

Lei Xin nodded while recalling the case.

Jiang Yuan continued: "Judging from the nylon rope and plastic cloth wrapping the corpse, the killer is likely to have obtained the relevant materials at hand. That is to say, the area where the killer is likely to be the first crime scene should be relatively easy to obtain these materials. You judged it this way at the time, right?"

Lei Xin continued to nod and made a record, then tentatively asked: "Is this judgment wrong?"

If it were an unfamiliar criminal police captain, the first thing he would think of at this time would be to question Jiang Yuan, but Lei Xin had been subtly transformed by Jiang Yuan. The first thing he thought of was whether he was wrong.

Jiang Yuan shook his head: "I have no opinion on this judgment. Your main mistake is in the autopsy."

Lei Xin's spirit was shaken. If there is a mistake, it means there is a possibility of modification, and there is hope for solving the case. As for the forensic doctor making a mistake, in Lei Xin's view, it is just like that when the forensic doctor is in front of Jiang Yuan. Some things, if you set the standard too high, those who don't make mistakes become the minority.

In fact, Jiang Yuan solving cold cases often has the move of picking mistakes. Otherwise, under the same conditions, wanting to get a different result is no different from climbing a tree to catch a fish.

Jiang Yuan took out the autopsy report and said: "When the corpse was discovered, it showed giant appearance, rigor mortis had been relieved. During the autopsy, comminuted fracture of the skull in the right occipital-temporal region was seen, the dura mater was complete, the brain tissue was autolyzed, the hyoid bone was not fractured, and the subcutaneous tissue and muscles of the neck, chest, and abdomen were emphysematous..."

After Jiang Yuan read part of the autopsy report, he added: "The cause of death is craniocerebral injury, plus mechanical injury. Forensic analysis, the murder weapon conforms to a blunt instrument tool with a long contact surface, hard quality, and easy to swing. It is speculated to be a metal stick. In addition, the strip-shaped skin injury around the neck, with subcutaneous hemorrhage in some areas, the injury conforms to a soft strip-shaped object, such as strangulation by a rope. The judgment of this part is quite good, but..."

Lei Xin knew that this was the meat of the play.

"The forensic doctor's judgment on the age of the corpse is problematic. Judging from the report, the pubic symphysis surface is relatively flat, there seems to be a ridge mark, the ventral slope has not reached the top, the lower corner appears, the ventral edge is basically formed, and the dorsal edge is not significantly everted... This observation is problematic, and there is a large difference." Jiang Yuan knocked on the table, and was slightly hesitant at this time.

Age judgment of corpses is the foundation, but the foundation does not mean simplicity.

Especially when judging by bones, even in the case of a pelvis, age judgment still has too many ambiguities. There are too many components of experience and subjective factors here.

In fact, looking at bones is similar to looking at human faces. Normal people can basically give an age estimate based on a person's face under normal circumstances.

Looking at bones is similar, but forensic doctors have refined it as much as possible, giving various specific parameters as much as possible. However, encountering relatively special people, or corpses in special environments, is like facing people who have put on makeup. The accuracy of age judgment will be greatly reduced.

And if the age is wrong, the source of the corpse will be even harder to determine.

"I will take another look at the bones later and make a specific judgment. But judging from the current information, the original forensic doctor's judgment of 28 years old plus or minus 1 year is a misjudgment." Jiang Yuan quickly gave a partial answer.

"Is it wrong by a lot?" Lei Xin immediately asked.

"It should be quite a lot." Jiang Yuan said.

"Good, good, good... I mean, this is a new clue." Lei Xin and others naturally had to combine age to check when looking for the source of the corpse before. If the actual age is quite different from the judged age, the reason for not being able to investigate the source of the corpse is there.

The instructor of the criminal police brigade on the side took out his mobile phone without hesitation and said: "I'll call Wu Wu Fa Yi Niu to bring the bones over. This case should have been followed by Old Niu."

"Okay." Lei Xin said and pulled the instructor to the side, saying: "Tell Old Niu, don't have a burden. It's not a mistake for Wu Wu Fa Yi Jiang to pick out mistakes. Let the attitude be upright first. You do a good job of ideological work for him."

"Understood." The instructor was solemn. This work is much more high-profile than comforting divorced police officers.