Fingerprints on snakeskin bags are not very easy to extract.
Generally speaking, fingerprints can be stored for a long time if the external conditions are relatively constant.
When Lu Chuan was in college, his teacher told a case where fingerprints were preserved for more than 30 years.
This fingerprint from that year is preserved on the hilt of a dagger.
This soldier's dagger was the murder weapon used by the murderer. After killing the person, the suspect threw the dagger into the well.
Generally speaking, if a dagger is thrown into water, it will rust quickly due to the erosion of the water flow and oxidation, and the surface will be corroded. In this way, even if fingerprints are exposed on it, it will be cleaned quickly.
Although the knife handle is made of wood, after soaking for a long time, the wood will absorb water and swell, and some things on the surface will be washed away. In fact, this kind of fingerprint is very difficult to preserve. .
But coincidentally, after the incident that year, there was a drought in the local area, and basically all the wells were dry. The same thing happened in the well where the suspect threw the dagger.
Because there was no well water flowing in the well water and the groundwater was not fully replenished, the water in the well evaporated quickly and the dagger was buried in the mud.
Because of the hot weather, the mud dries up quickly. The entire dagger is equivalent to being protected and isolated from the outside oxygen.
Later, the suspect was arrested for other cases and brought out the case. However, it had been 30 years since the incident. Although the murderer had already confessed and thrown the dagger there, the police felt that there could be nothing wrong with it. The clues stay.
But this dagger is a murder weapon after all, so we must find it even if there are no clues on it.
But what the police did not expect was that because the dagger was buried in the mud, it was physically isolated from the outside world. There was no corrosion from oxygen and no erosion from water flow. As a result, the dagger disappeared after it was discovered. It was as if it had just been thrown down, and the blood on it had not even dried completely.
The fingerprints on the handle of the knife are also clearly visible.
But this situation is only in extreme cases. Because it is physically isolated from the outside world under the protection of silt, the fingerprints on the handle of the knife can remain.
But there was no water in the dry well where Zhao Haitao and Li Haiyang buried the gold.
The preservation conditions are not particularly good, but fortunately the place where they bought a layer of gold is in a horizontal hole in a dry well.
In addition, this dry well has been abandoned for many years, and there is no shortage of water in it, so. Relatively speaking, it is relatively well preserved. It has not been exposed to wind or sun, and no one has touched it, so the fingerprints on it are relatively easy to clean out.
According to the information recorded in the first volume of the robbery that year, this snakeskin bag should have been brought by three robbers.
So it stands to reason that these gold jewelry should have the fingerprints of the three robbers back then, because they used their own snakeskin bags and put the gold in the carriage into them. If so, they would definitely be exposed to gold.
There are also their fingerprints on the snakeskin bag, and Lu Chuan is extracting these fingerprints.
In addition, if Zhao Haitao and Li Haiyang are indeed related to the gold robbery, then there should be fingerprints of these two people on the surface of the snakeskin bag. It's hard to say whether they touched the gold inside.
Of course, from a human perspective, there is a high probability that these two people have moved, so the fingerprints on them are also the focus of Lu Chuan's investigation. However, because of the heavy workload, he let Two other detectives from the Criminal Police Brigade came to analyze the fingerprints on the gold.
Fingerprint identification on this gold is easier, but it is very difficult on snakeskin bags.
Because snakeskin bags leave fingerprints on soft materials, it will be very troublesome to find them.
Lu Chuan also studied for almost three hours before finally extracting some relatively damaged fingerprints from the snakeskin bag. Although they were damaged, there was still something to gain if compared with the target fingerprints. After all, the police now do not need to use the fingerprints on the snakeskin bag to find the suspect, but only need the fingerprints of Zhao Haitao and Li Haiyang. As long as there is overlap in comparison, it means that these two people must have touched this snakeskin bag.
Sure enough!
After working for several hours, Lu Chuan finally discovered that three of the broken fingerprints matched two of Zhao Haitao's fingerprints, and one of them matched Li Haiyang's.
Hearing Wang Zhaokai's question, Lu Chuan nodded: "Successful!"
"Great!"
Evidence!
The most important thing in handling a case is evidence.
Even if the police suspect that Zhao Haitao and Li Haiyang are related to the robbery that year, they do not have any personal or physical evidence. The situation of these two people with Li Haiyang is not yet known, but Zhao Haitao refuses to speak.
In this case, if Li Haiyang insists and does not tell what happened at that time, then the police really have no other way to deal with the two of them.
In fact, this is indeed the case.
Although Li Haiyang was arrested, he was just like Zhao Haitao, as smelly and hard as the stones in the pit, and refused to explain anything. Why did he leave Haizhou City back then? Why get a fake ID? Why did you log off the phone?
Obviously the two people had already discussed when they would come back when they left, what to say if they were caught by the police, etc.
In the interrogation room.
"Captain Chen, really, don't waste your time with me. I do know Li Haiyang, but we are not familiar with each other. I don't know why he left us just to talk about me. I didn’t do anything illegal, but I just stole something. You should detain me, and I should return the stolen goods to others.”
hehe.
Chen Jiang sneered.
"At this time, Zhao Haitao, do you still want to fight to the end?"
"Li Haiyang is being interrogated next door right now, don't you want to hear what he has to say?"
Next door?
Zhao Haitao was stunned!
But then he calmed down.
After the two of them hid the gold, they talked in detail about what they should do if the police found them in the future.
The two people actually picked up the snakeskin bag on the roadside, but it does not mean that the two people did not know what happened that year.
After the two people picked up the snakeskin bag and saw that it was full of gold, they were immediately confused. Then they saw a police car approaching from behind. They were frightened at the time, but the police car roared past and stopped. Didn't notice them.
Then the two people heard a gun coming from the front, and then the two people took the snakeskin bags and ran back to the yard where Zhao Haitao rented. (End of this chapter)