Chapter 1229

"Oh my, I suddenly feel agitated!"

Li Guangnian rubbed Shen Changfeng's neck, his tone was full of emotion, saying: "Rainy night murder, there have been three victims in succession, the killer's means are cruel, and he has extremely strong anti-reconnaissance awareness. Currently, the found corpses are all in a decomposed state. Director Jiang himself hasn't been able to participate in the first autopsy. Although this is the case... but..."

Shen Changfeng had been trained by his own captain for several years after all, and immediately shouted reflexively: "Yes, yes, agitated! The emotions have become agitated."

"Then you accompany Director Jiang well here. If there is anything that needs to be done, hurry up and help. If you need to connect, you also hurry up and handle it." Li Guangnian released a string of orders quickly.

"Yes." Shen Changfeng took it habitually without a trace of bargaining.

"Director Jiang, then we will go to investigate the situation of the victim in the days before death." Li Guangnian smiled and indicated his withdrawal.

"Pay special attention to the occupations of the various people around him. Especially those who will come into contact with various knives, um, hobbies should also be paid attention to." Jiang Yuan reminded.

"I understand. Nowadays, some people like to dance with knives and guns, just like some otaku, they can't even play with Gundam, and they start buying Frostmourne. What's so good about buying World of Warcraft peripherals..." Li Guangnian said two sentences, waved his hand, and left.

Cui Qishan and the others also left one after another.

Shen Changfeng waited for everyone to leave, and when there were only himself, Jiang Yuan, Miao Ruixiang, Mu Zhiyang, Wen Ming, and a corpse skeleton left, he whispered: "Our captain especially likes Director Jiang. Before he had a chance to contact you, he had mentioned your stories. This time he saw you, he was especially excited..."

"It can be seen, he hit you quite hard." Mu Zhiyang closed the door of the autopsy room, and then had time to complain.

Shen Changfeng hurriedly said: "It looks painful, but it's actually not that painful, and they are all familiar positions, and they are all beaten to fatigue."

"This counts as workplace bullying." Mu Zhiyang said.

Shen Changfeng shook his head hurriedly: "No, our captain is post-80s, an old two-dimensional fan, and he does things according to the template of Takenori Akagi. He is actually quite good to me."

Mu Zhiyang curled his lips: "You should still resist if you should."

Miao Ruixiang next to him asked curiously: "What is Takenori Akagi?"

"He is a character in the manga 'Slam Dunk'." Shen Changfeng explained.

Miao Ruixiang expressed that he understood: "In 'Slam Dunk', what is it about?"

Jiang Yuan took out all the photos involving wounds when the male corpse was first autopsied and placed them in front of him to read carefully.

In homicide investigations, the murder weapon is always the top priority. When Jiang Yuan was young, the funds in Ningtai County were so tight, Huang Qiangmin would drain the water in the small river to find the murder weapon, and Shen Yaowei had also traveled all over the garbage mountain to find the murder weapon.

A homicide case is not clear just because the police say the facts are clear. If you can't even find the murder weapon, how can you say it's clear!

Especially in the links of submission for inspection and court, whether there is a murder weapon is two environments. Not to mention domestically, just taking the United States as an example, without a murder weapon, how can you guarantee that the American police didn't use the Great Recovery Spell, how can you guarantee that the suspect didn't suffer from torture, how can you guarantee that the stupid American police wouldn't investigate wrongly, and wouldn't have a case of replacing the dead?

Of course, having a murder weapon is not enough to prove it, so many evidence chains including the murder weapon are needed to prove it.

And in homicide investigations, the murder weapon is often a key, especially in this rather chaotic situation where many traces on the corpse have been washed away by rain, and the night and suburbs make surveillance difficult to play a role. At this time, finding the murder weapon will naturally bring a series of clues.

Especially this male corpse, when Jiang Yuan discovered that the wound was not caused by a professional knife, he had already decided to try to find the murder weapon.

The "professional knife" Jiang Yuan mentioned here actually refers to "ordinary knives," more likely ordinary knives held by professionals, rather than professional knives held by ordinary people.

For Jiang Yuan, who possesses "Trace Examination - Tool Mark Examination (LV6)," this is the clue he currently sees that is easiest to investigate.

Although the killer's wound is not easy to make the appearance of the murder weapon because it has been stirred, this is at most the difficulty of LV3 to LV4. If it were a first autopsy, combined with methods such as glue injection or scanning, Jiang Yuan estimates that with an LV3 Great Perfection, plus a full-level LV2 unit with money, he could basically reach a conclusion that is about the same.

Unfortunately, the person responsible for the first autopsy was Shen Changfeng.

There is nothing to say about this. Donghua City is only limitedly stronger than Qinghe City. When Jiang Yuan is not in Ningtai County, the local forensic doctors are either Miao Ruixiang or Wu Jun, who are also limitedly strong.

Pathological autopsy itself is not difficult. After solving the problems of nausea and vomiting, ordinary forensic doctors graduate from university, and after working for a year or a half, they are basically proficient, and daily autopsy reports can be written very smoothly. The key is that murder cases are hard to find, and serial killers are even scarcer.

Although Shen Changfeng fantasized in his dreams that one day he would encounter a major case, finish it off in a few strokes, and harvest applause from various colleagues and two-dimensional fans, he did autopsies of car accident deaths, suicide deaths, and accidental deaths on a daily basis, which is equivalent to being a social screw doing things step-by-step throughout his career. Suddenly, a mildly decomposed corpse appeared in front of him...

It is not easy to require Shen Changfeng to be able to make a judgment, and it is a bit unrealistic to require him to be comprehensive.

Fortunately, Shen Changfeng's basic operations are standard. He took photos where they should be taken, and the whole autopsy was recorded. Young people who graduated from regular schools have this advantage, especially students who graduated from good schools. No matter how surging their inner hearts are, they can always calm down and complete the most basic work.

Instead, it is not something that should be required of a forensic doctor to be able to infer the appearance of the murder weapon from the appearance of the wound.

For a normal forensic doctor to train an LV3 skill, it takes 10,000 hours to start. But today's corpse requires pasting the appearance of the murder weapon, tomorrow's corpse requires skull restoration, and the day after tomorrow's corpse requires forensic anthropology. How can a grassroots unit have such a person?

Except for Jiang Yuan, and various Eight Tigers.

As for the experts invited by Donghua City later, they should have a tool identification level above LV3, otherwise they wouldn't be called experts. However, the difficulty of doing tool identification for this corpse was already high, and the difficulty of the second autopsy was even higher. Plus the factor of decomposition, simple tool identification, even if it is LV4, is estimated to be useless.

However, these are not difficult for Jiang Yuan.

In addition to LV6 Trace Examination - Tool Mark Examination, he also has LV4 Skull Restoration, LV5 Image Enhancement Technology, and LV5 Image Recognition and Analysis. The latter three are used for modeling, which is much more difficult than a murder weapon.

Knowing how to do it is one thing, but the steps that should be taken cannot be omitted.

Jiang Yuan first has to screen the photos, not only the photos involving wounds, but also pay attention to lens and distortion control—it is not bad that Shen Changfeng can calm down and complete the photography task, but there is still a gap from LV2 Criminal Photography.

After screening the photos and doing quality assessment, Jiang Yuan then performs data calibration on the photos that need to be used, that is, calculating the actual length corresponding to each pixel, and finally choosing a reference point to align the photos from multiple angles in space.

When doing this step, Jiang Yuan used Agisoft-Metashape.

And it was while doing this step that a child next to him who was trying hard to learn and actively taking notes shattered gently.

Until Jiang Yuan started doing 2D feature extraction, started parameter modeling, and then opened ImageJ to analyze the tissue tearing direction, thereby reconstructing the stirring trajectory, Shen Changfeng laughed out loud.

(End of chapter)