National Forensic Doctor

Chu Ju jumped over the bushes on the roadside, over the excrement of the great erect ape, and stood in front of the victim. After carefully looking at the wounds on the body, he stood up and sighed.

"You are still a very young child. Do you have an ID?" Bureau Chu asked.

"There is an ID card in the backpack. I am 16 years old, from Beijing, a first-year high school student, studying at a key city school, with no criminal record, my parents are both high-level intellectuals, and my marriage is still ongoing..." Jiang Yuan just checked the backpack. This is the fastest time he has determined the source of a corpse.

Several key points explained by Jiang Yuan actually also imply some exclusion points. For example, if you study in a key city and have no criminal record, it means that you have to spend a lot of time studying, and you are unlikely to be exposed to industries such as gambling and drugs that are prone to gun crimes and force people to take risks.

To put it in terms of absolute discrimination, it would be difficult for those who play disco and walk around every day to stay away from gambling and drugs. If you are a relevant practitioner, if you work hard for three years, you will be a proper underworld reserve.

Director Chu nodded and asked the most important question at this time: "Was the deceased shot to death by a standard gun? Can the type of gun be determined?"

"The bullet has not been found yet. The deceased's wound was a penetrating wound, and the exit was starburst-shaped, which is a typical characteristic of a rifled gun. Judging from the power, the possibility of a standard gun is high." Jiang Yuan pondered for a few seconds and said: "There was no smoke halo, no particle burns, it was a long-range shot. A forensic long-range shot, one meter away."

"This case..." Bureau Chu was really overwhelmed. He waved the lottery ticket helplessly and asked, "Can the case be merged with Zhang Lizhen's case?"

"No." Jiang Yuan replied decisively: "At least I can't see the relevant points yet."

"Okay, that's one more gun-related case. What do you think about coordinating the handling, or I should set up a separate task force." Director Chu still has relatively little contact with Jiang Yuan, and he is worried that he will not understand, and deliberately Said: "If a separate task force is set up, the crime area here will have to be given up to the new task force. If they want to search or investigate, you will also have to discuss jurisdiction issues..."

If we handle them as a whole, we will be responsible for two cases at the same time, which is of course very difficult. It's equivalent to choosing between arguing and taking responsibility.

Jiang Yuan naturally chose the latter. He was a mercenary, so he would lose in any argument.

Bureau Chu was not surprised. He nodded and said, "Then I will report it to the superiors first, and you should seize the time to investigate."

The priority of gun-related cases is very high, but the number of gun-related cases is actually not as small as many people imagine, to the point of being astonishing. For example, according to a public information, the ministry announced that from May 2020 to March 21, a total of 40,000 gun explosion cases were solved in various places, 113 gangs were eliminated, 314 dens were destroyed, and 4 criminal suspects were captured. Thousands of people. Another public news is that the ministries and commissions have deepened the special campaign to crack down on gun blast crimes. In the 24th round of centralized operations, a total of 1,724 criminal suspects were arrested, 52 dens were destroyed, and 3,975 guns of various types and 10,000 bullets were seized. hair.

In Beijing alone, in the first half of 2019, the city cracked 18 gun-related cases and confiscated more than 170 illegal guns, more than 650 imitation guns, more than 30,000 bullets, and more than 30 used artillery shells (landmines). , more than 140 people were detained in public security and more than 30 people were detained criminally.

A very reasonable inference is that if gun-related cases are so rare that if they happen once, they will be out of the circle, then there will be no need to hold various types of special operations involving gun-related crimes.

Tao Lu and others also visited the scene one after another, and Jiang Yuan continued to conduct on-site investigation.

Following the steps of the leaders, Cui Qishan first shook his head helplessly at the members of his task force, and then asked Tao Lu, "Tao Zhi, Team Jiang doesn't know if he is good at gun cases. Do you want to find a firearms expert?"

This is considered a very normal suggestion, and it is true that ordinary police officers rarely come into contact with gun cases.

After all, there have been 30 to 50 gun-related cases in the capital over the past year, but the number of shootings is even smaller. The frequency of shootings is actually about the same as abnormal deaths in small counties. In a small county, only one forensic doctor can handle these abnormal deaths. Similarly, the Beijing Bureau actually only needs one person to handle these gun-related cases.

Tao Lu hesitated for a moment, then turned to ask Huang Qiangmin.

Huang Qiangmin said casually: "Since Jiang Yuan did not call for reinforcements, at present, it is probably not needed. Of course, it is not a bad idea to find someone to come and take a look..."

If Huang Qiangmin was allowed to make his own decision, Huang Qiangmin would definitely listen to Jiang Yuan now in terms of technology. But thinking about it from another perspective, Huang Qiangmin was worried about letting Jiang Yuan bear too much responsibility, so he thought it would be a good idea to find an expert to come and take a look.

Tao Lu nodded and watched Jiang Yuan operate. Although there is a sense of urgency, it is not so urgent that I can't wait for a moment.

Jiang Yuan processed each piece of evidence step by step.

When handling gun-related cases, the first step should be to look for warheads, cartridge casings and firearms. All three of them have direct physical contact with the murderer and it is very easy to obtain relevant information. Most gun cases are solved based on this.

When he is lucky, the murderer will throw the gun at the scene, the bullet casing will fall next to the gun, and the bullet will remain in the body of the deceased. This is what happens when good luck happens - the deceased may not think so, but he can no longer Made an opinion.

As for this case, Jiang Yuan could not see any firearms at the scene, so he only sent people to look around. By the way, I also tried to find the first scene and possible shell casings.

Judging from the traces at the crime scene, after being hit, the deceased probably did not realize what happened and subconsciously walked forward, but soon became exhausted and even lost consciousness. So, he took off his backpack from his back, carried it on his chest, sat down on the spot, and took out a water bottle to drink water. Then he lost too much blood, fell into shock, and died.

This process should be relatively fast. Referring to the bloodletting time at the pig killing site, the ability of human beings to struggle and move is not much better. As for specific data, there is probably no experimental data.

More than a dozen policemen who were on hand to investigate and merged circled around to look for guns and ammunition.

Logically speaking, one can follow the bloodstains to the scene, but in fact, in the woods at this season, humans can no longer distinguish the bloodstains. Considering the position of the firearm and the bullet casing, they are easily affected by the murderer, so it is of little significance to forcefully search for blood. At the same time, the warhead probably penetrated the victim's body. It is difficult to say where exactly it landed.

Jiang Yuan focused mainly on the shooting marks.

There are two types of shooting traces. One is the invasion trace of the warhead, which is the impact point, entrance and exit, and ballistic trajectory. For example, the star-shaped exit that Jiang Yuan emphasized just now can provide various information such as the type of firearm, and the ballistic trajectory is very likely to provide the positional relationship between the two parties during the conflict.

However, due to the movement of the deceased at the last moment, it is not very convenient to determine the trajectory through the injection tube in his body.

Jiang Yuan only took a cursory look and postponed this part of the work until others came back from the investigation and gathered information from all parties.

Then, Jiang Yuan began to deal with the second type of shooting marks, that is, shooting residues. This part includes the marks left on clothes, as well as wiping wheels and contusion wheels.

This is a concept that ordinary people in China are rarely exposed to. When the warhead rotates into the skin, the dirty things attached to the warhead, such as metal shavings, butter, boogers, dirt, etc., rub against the edge of the window and cause scratches on the skin. A circle of dark brown wheel-shaped band appears, with a width of about 1 mm, generally in a ring shape, and will be extremely obvious after drying.

If there is a sufficient database, it is possible to solve the case just by wiping the information on the wheel.

Jiang Yuan studied with great joy, while Liu Jinghui ended his observation and jumped down from the tree.

Liu Jinghui thought for a moment, then pulled Xu Taining and asked, "Chu Xu, is our investigation in this area thorough? How detailed can it be?"

"About average." Xu Taining said.

The average is just a few people per square kilometer. Because the drone team is a comprehensive team composed of multiple people, on average, one square kilometer can accommodate single-digit police officers.

Liu Jinghui nodded and said, "Can we use this place as the center and strictly search the surrounding area?"

"What a range."

"A radius of 5 kilometers within walking distance? At least 3 kilometers."

Xu Taining calculated that this area is not small, and said: "It should be no problem if we check carefully at 3 kilometers."

"My main consideration is that the deceased did not walk far after being shot, and the utensils around him were intact, indicating that the murderer's purpose was not to seek money. Secondly, the deceased was a teenager, and it is unlikely to provoke the God of Death, at least it should not be like this. He was shot to death. Therefore, the murderer's purpose is not to seek people. The murderer was not seeking money or people, so the possibility of accident is very high." Liu Jinghui explained in a low voice.

"You said earlier that there was a hunting accident?"

"It's very possible. It might even be a stray bullet that the murderer didn't find. Of course, this probability is still relatively low. But in any case, the murderer is either a licensed hunter or an illegal hunter. If you are a licensed hunter, I will let Wang Chuanxing If they go to investigate, if it's illegal, they might be the same group of people as in the Zhang Lizhen case!" Liu Jinghui's reasoning was so perfect that Xu Taining looked serious when he heard it.

"Okay. Let's check 5 kilometers in detail." Xu Taining quickly ordered.