stjorthotic Chapter 1227 Stay
Chapter 1227 Stay
Chapter 1227 Stay
Jinshan at night looks like a steamed bun that has been grabbed by black hands. The light from the stars looks like the dark marks left on the bun, a little bright but not bright enough, similar to the matte feeling.
The road under Jinshan has been renovated several times. If you look closely, you can still see some traces of the old road, especially the few places where the bends are straightened, which look suitable for ambushes.
Jiang Yuan asked someone to find an electric bike. He would ride for a while and then get off to take a look, and asked Wang Chuanxing to take notes from time to time.
Liu Jinghui followed behind on another electric bike, yawning constantly because he was sleepy, forcing Cui Qishan next to him to pay attention from time to time, fearing that he would fall asleep.
There was another big bend. Jiang Yuan stopped the car and shone the flashlight. He saw garbage that looked like clothes stuck in the gutter beside the driveway.
The criminal justice technician who came with them hurried forward and pulled up the garbage with a hook, but it turned out to be several plastic bags full of dirt.
"Probably not." Jiang Yuan waved his hand and gave up.
This is a common situation that criminal police encounter when they go to crime scenes. Most people imagine that every piece of evidence is collected at a crime scene, but in reality, only the evidence that looks most like evidence is collected.
Therefore, the criminals who are not caught in ordinary cases are not because they have overlooked something. They may have overlooked thirty or forty things, but for various reasons, the detectives did not catch them.
Some criminals become arrogant and think they have mastered some amazing criminal skills. They then repeat the crime, escalate their crimes and provoke the police. At this point, the police's comb will suddenly become dense, and the criminals who are not particularly lucky will basically be caught.
Therefore, why can relevant evidence be found when some unsolved cases return to the scene of the first crime? It is not entirely true to say that the detectives in the first case were irresponsible. The cast of the criminals has risen, and the level of the task force has been improved, which means that the comb has become denser.
However, even if Jiang Yuan is organizing a special task force, it is impossible to throw all the garbage into the laboratory. The refinement of evidence is endless. The garbage bags can be taken back and dissolved in water for liquid phase analysis, or cut into pieces for 100 sets of liquid phase analysis, or dipped in cotton swabs for trace analysis, but useless things are useless after all.
Jiang Yuan crossed the drainage ditch and walked into the bay. A large buffer zone was built here. Whether driving or riding a bicycle, you can only see the bend, and you can't see the deep part of the buffer zone. If there are people hiding, this is a good place to wait.
Two criminal justice technicians raised their headlights at the scene to illuminate the buffer zone clearly.
Jiang Yuan looked at the ground carefully.
This is a leveled ground, but the ground is soft and dusty. If it is not specially cleaned, footprints can be seen.
If it was cleaned specially only a week later, with Jiang Yuan's ability, he would be able to see the footprints.
"Is there?" Liu Jinghui got out of the car and walked a few steps. He felt much more sober and only said half of the words. He felt that his dragon should be able to understand.
Jiang Yuan straightened up and said, "There are footprints, but the time doesn't match. They are old footprints. Take them."
Jiang Yuan waved his hand and called for someone to come and pick up a few footprints that were almost buried in the dust.
"Not here?" Liu Jinghui asked.
"Probably not." Jiang Yuan shook his head.
Liu Jinghui pondered for a few seconds and said, "You are now scanning the scene for traces based on a concept: the victim came out of the subway station, rode a shared bicycle, encountered something or someone, and then disappeared. If the case is not carried out according to your concept, you will not find any traces at the scene. In fact, even if you carry out your concept, you may not be able to find the scene, right?"
"Yeah." Jiang Yuan admitted. Suppose it was just a simple car crash, or even no car crash at all, if someone parked their car on the side of the road, stopped the victim, and then tricked him into getting into the car, or kidnapped him, a week later, it would be difficult to find clues in this way.
Seeing Jiang Yuan's approval, Liu Jinghui immediately became excited and continued to analyze, "Compared to investigating this uncertain scene, perhaps it would be more effective to find a means of transportation. The victim is missing, and unless she ran away on her own, the criminal must have a car or something to take her away."
Xiao Si was listening from behind, and at this moment an idea flashed in his mind: "Makeup?"
"Also..." Liu Jinghui sighed: "It's possible, but it's too outrageous."
"There are too many vehicles." Jiang Yuan had naturally thought of this plan. In fact, they had solved cases by checking vehicles more than once or twice.
However, vehicle checks often require the cooperation of vehicle checkpoints, that is, when a car approaches, the surveillance camera will take a photo. Moreover, specially designed roads are required to cooperate with surveillance cameras, so that appropriate light sources can be maintained throughout the day to ensure that the entire car is photographed, especially the license plate and the faces of the driver and co-driver can be clearly captured.
Without vehicle checkpoints, the workload of vehicle inspections would increase a hundredfold, and it would be easy to miss things and take unclear photos. It would be even more difficult to take clear photos of the driver and co-pilot’s faces. The high-definition surveillance video cannot be higher than the photos taken by the checkpoints, and the storage capacity is not on the same level.
Jinshan is located in the capital, so it is possible to find a vehicle checkpoint, but the distance is far, and there are more vehicles entering, most of which may not be vehicles passing through the site, which increases a lot of ineffective work. Of course, even so, using a distant vehicle checkpoint to check vehicles is less labor-intensive than finding a few high-definition cameras to check vehicles.
In the end, no matter which solution was chosen, the workload was too great. Vehicle checkpoints were all placed on the main roads, and the traffic volume in Beijing was so huge... If we just checked a license plate, it would only take a few minutes, but searching aimlessly would be an endless task.
Liu Jinghui was not just saying this casually. He thought for a while and said, "This is what I think. No matter what the suspect thinks or what his purpose is, he may have stayed in this area for an unusually long time."
When Liu Jinghui started thinking, his face was still bright - the investigation light next to him was still on - he counted on his fingers and said, "The victim rode a bicycle from the subway station, passed the nearby streets, and the industrial and commercial enterprises, then went into the mountain, and finally arrived at the gate of Jinshan. The total distance is about four kilometers. Normally, we can ride a bicycle in 20 to 30 minutes. How long will it take for a car to travel this distance?"
Liu Jinghui gave his judgment: "Normally, I would say that it would take 5 minutes for a car to travel this distance. Of course, we need to check the vehicle checkpoints. We are not sure where they went in the middle. We can calculate the elapsed time. The background software should be able to calculate it directly. List the vehicles that exceeded the time limit and count them as suspects. How about that?"
"There are no checkpoints at the subway station, nor at Jinshan. We can only search from the front and back. Among them, passing cars are the easiest to be screened out, but some cars are going to Jinshan for fun, some cars are employees of companies in the middle, and there are so many local residents, residents of various communities and self-built houses, their cars may stop as soon as they come in..."
"Bring the data from the parking lot in front of Jinshan and screen it. As for the local residents... Actually, you know what, these residents are really suspicious..." Liu Jinghui stopped talking.
Thefts are often easier to commit in faraway places, but murders are not necessarily the same. From the subway to Jinshan, there are several forks in the road, and there are rows of buildings inside.
Although the occupancy rate here is not high and many houses may be empty, there are still many people living here. Moreover, because there is a subway station and the suburbs are cheaper, some residential buildings have group renting. So, there are quite a few people living within these few kilometers.
If the criminal lived in this area, committed the crime here, and then drove home from a certain fork in the road, all previous investigations would have been in vain.
"Let's wait until the dog comes." Jiang Yuan shook his head and said, "Let's continue watching the scene."
Predictions and probabilities are meaningless in the face of real cases. Some investigations may end in failure, but it is these failed investigations that can gradually narrow the scope of the investigation.