Chapter 443 The Corpse Under the Bridge Hole
When Lu Chuan and others arrived at the Lion Rock Bridge, the sky was already dark and the sun was about to set.
Qin Yong is making work arrangements.
“Comrades, this morning we got clues that Wang Mingshan, who disappeared five years ago, may have been killed, and his body may be buried under the Lion Rock Bridge.”
Huh?
"Old Wang?"
"Is Mingshan here?"
Wang Mingshan was a member of the second action team back then. Everyone in the team knew Wang Mingshan except those who had joined the team in the past two years.
This is also the reason why Qin Yong transferred the second team.
Lu Chuan and Zhang Hui looked at each other. This clue should be the one Ren Qiang got.
"Everyone, be quiet. We just got such a clue, but the source of the clue has not yet been found out."
"Whether Wang Mingshan's murdered body was buried under the Lion Rock Bridge, it's not yet clear." I am very sure that our task tonight is to investigate under the Lion Rock Bridge and try to find clues."
"Team Qin, it's getting dark and it will be dark soon. Let's investigate at this time. Will you miss something? If not, check again tomorrow morning. The investigation can be more detailed."
"No"
Qin Yong shook his head: " There are some things you don’t know. Time is very tight. We must investigate clearly tonight. Okay, let’s start working now.”
Since Qin Yong said this, everyone had no complaints and started patrolling.
Of course, the focus of the task is still on the investigation and forensic side.
"Old Liu, what do you think?"
Wang Changjiang looked at the situation under the bridge and frowned deeply.
Under the Lion Rock Bridge, there was originally a channel of the Lion River. Thirty years ago, the Lion River stopped flowing due to the reduced water flow.
But because a river once flowed through it, the land in the river here is very fertile, and there are dense weeds under the bridge.
At first glance, some places are taller than people.
There are only some places covered with sand and gravel, like bald patches on a person's head, scattered across the river.
"I suggest starting from the east and checking to the west."
Liu Guodong pointed under the bridge and then explained his suggestion: "There are access roads on the east side of the entire river, but farmland is on the west side. , the nearest lane change there is one kilometer away.”
"If the other party really killed Wang Mingshan and buried the body under the Lion Rock Bridge, how would he transport the body here?"
"It is most likely to drive here from the east lane, because If there is farmland to the west, it is unlikely that the other party parked the car 1 kilometer away, then carried the body across the farmland, and then came to bury the body."
"In addition, Wang Mingshan was there when he disappeared. In August, the grass under the bridge is already very lush. In this case, if the other party really buries the body here and lies in the weeds, it is unlikely to penetrate deep inside. "
"After all, not only is it difficult to pass through weeds, but it is also easy to create a passage where weeds are lodging. If someone pays attention, they are likely to be discovered."
"So, I suggest starting from the east side of the bridge, starting from Push it from both sides and check it meter by meter.”
Wang Changjiang nodded, obviously agreeing with Liu Guodong's suggestion.
"Do you have any other ideas?"
"I have a point."
What Lu Chuan was holding was a variable frequency spectrometer. "If Wang Mingshan was buried under the bridge five years ago, then the body must have decomposed and become skeletal by now."
"Human bones contain a lot of phosphorus. After the bones are skeletal, the phosphorus will naturally volatilize."
Everyone knows this. In novels, it is often written that some people see will-o'-the-wisps floating in mass graves. In fact, this is not the case. What a fabrication, but true.
Scientifically speaking, it is a phenomenon in which phosphorus volatilizes and meets oxygen in the air to produce a chemical reaction after the corpse skeleton is skeletonized.
Because the flame produced by the oxidation and combustion of phosphorus and oxygen is green, the will-o'-the-wisps you see are all green.
However, this generally requires a large number of corpses and the skeletons are gathered together to produce this phenomenon. Generally speaking, the amount of phosphorus volatilized from individual skeletons is very small, and it is unlikely to produce will-o'-the-wisps.
"After the phosphorus produced by a single corpse volatilizes, it is unlikely to produce a will-o'-the-wisp, which is the spontaneous combustion of phosphorus. However, through irradiation with a variable frequency spectrometer, it is possible to see some special phenomena."
Here, Lu Chuan explained It's not particularly clear, but this method is called gas chromatography.
The principle is very simple, that is, any substance will have different affinities in the chromatogram. Under the irradiation of a certain laser light source, visible light reactions may occur.
In addition to gas chromatography, there is also liquid chromatography. Compared with gas chromatography, liquid chromatography is more accurate and the intuitive response obtained is more direct.
But using liquid chromatography requires the substance itself to be dissolved, and testing is required.
Now this situation is to determine the position of the body. Naturally, there is no dissolution of the bones themselves, so this time gas chromatography should be used.
After determining the location to start the search and the specific working methods, the action is ready to begin.
The members of the second operation team were divided into four people to guard, and the other personnel participated in the search work.
Lu Chuan is debugging a variable frequency laser spectrum analyzer. If he wants to discover the presence of phosphorus, the most important thing is to find the corresponding laser frequency. For different concentrations of phosphorus volatiles, the corresponding laser frequency will also have subtle differences. There are differences, so Lu Chuan needs to keep debugging.
In addition to Lu Chuan’s method, others also have their own methods.
Finding corpses is one of the most important tasks of a criminal police officer. There have been cases of finding corpses in the wild before.
According to past work experience, if there is vegetation growing in a place where corpses are hidden in the wild, it will be more lush than other nearby vegetation.
This impact can be divided into short-term and long-term.
The short-term impact is that during the decay process of the corpse, the flesh and blood decompose, which will produce a large amount of organic fertilizer, which is better absorbed by the vegetation and will naturally grow better.
But in this case, the corpse is usually not buried deep enough, and the organic matter from the decayed flesh and blood will be absorbed by the plants.
In most cases, the bodies are buried at a depth that the roots of ordinary herbaceous plants cannot reach.
In this case, the short-term impact will not be obvious, but as time goes by, the organic matter in the bones will gradually decompose and volatilize, and slowly penetrate into the soil.
This will also cause the plants near the burial site to grow more luxuriantly, and last for a long time, one year, three years or even five or ten years.
"Everyone will rush to the areas with particularly lush vegetation to see if there are any traces left."
If the other party was more careless when burying the body, there might be some kind of belt. Clothes, glasses, etc. are left behind.
If these things are found, the body will basically be found. Of course, in actual situations, this is very rare.
Especially because it has been 5 years since Wang Mingshan disappeared. Even if the soil surface was different from other places due to stirring, 5 years later, it has become the same.
(End of this chapter)