The next morning, the morning glow was full, and there was a lot of moisture in the air outside, and it seemed that it was going to rain heavily.

And Xu Zheng received a call from Zhang Yuqi at five o'clock in the morning, asking him to get up early and go to Fuzhong Wisdom City.

It turned out that yesterday's experts in the city bureau's on-site investigation and trace inspection did not find evidence at the scene, no, Yan Zizhong proposed to let Xu Zheng try it, after all, Xu Zheng's technical investigation skills are still obvious to all.

However, last night, the investigation and trace inspection did not check the results, Wan Haihong and they discussed it, if it doesn't work, they will focus on the interrogation, maybe Miao Yu's own words are not rigorous, and he will make mistakes.

This is also a helpless way, after all, the existing evidence is unfavorable to Zhou Mu, and Zhou Mu and Miao Yu both deny each other that they killed someone.

After Xu Zheng answered the phone, he didn't set off directly, but went into his small studio, he wanted to prepare a potion, with the advanced technical detection technology and knowledge given by his current system, it happened that he still had the materials of skull angiography at home, plus other materials he had bought on the Internet before.

It's enough to make a bloodstain stripping water.

His small studio is not equipped with air conditioning, and when he comes out, he is already soaked, the weather in Changming City is like this, it is particularly hot in summer, and when it comes to a rainstorm, people are like living in water vapor, and they feel wet when they touch anything.

At six o'clock, Xu Zheng rushed to the scene of the crime in Fuzhong Wisdom City, and at this time, the squadron leader of the technical reconnaissance team, Elder Xu, was waiting here, "I'm sorry, Squadron Xu, I'm late."

Lao Xu was a simple-looking technician, and he wiped the sweat on his forehead when he heard this, "Young man, you like to sleep lazy, this job is not too rushed, as long as the result is out before the interrogation."

Xu Zheng put on a mask, gloves, shoe covers, and head coverings and picked up the tools used for technical detection, "Then let's start, in this weather, you will sweat if you move casually, or stay in the air-conditioned room to be comfortable."

While the two were talking, they officially started to work, Room 7012 is now equipped with several high-power spotlights, which are like daylight, very bright, working in this environment, this must not die of heat.

Before Xu Zheng started, he felt a pair of gloves soaking wet, "Squadron Xu, can you tell me about your previous work?"

Lao Xu nodded, and he didn't hate that Xu Zheng didn't do his homework when he came, "You see, the outline of these three figures on the ground, they are not far apart, plus the blood oozing from the wounds of their corpses, it can be judged that Tong Yanjiang and the three of them were kneeling here at that time, Tong Yanjiang was slightly obese, plus he was in the grade, and he hadn't eaten for several days, so he was knocked on the back of the head with a stick when he just stood up.

Guo Jingqing stood up, but when he ran away, he was tripped by Tong Yanjiang's corpse, and he was knocked on the temple at once.

As for Chu Yi because he is young, and because he is not only a lover relationship with Zhou Mu and Miao Yu's wife, but also a variety of destructive behaviors, Miao Yu and Zhou Mu "take care" of him the most, and they use a lot of means on him.

You see, there are three places of blood that automatically fall, this is because Chu Yi has been hit three times on the head, the first time is that he was knocked down as soon as he got up, the second time is that he was beaten lying on the ground, and the third time is that someone turned his body, it should be to make sure that there is no death and make up for it.

We can't tell who the murderer is from the footprints near the corpse, mainly because the corpse has traces of dragging, which has damaged the footprints of Zhou Mu and Miao Yu a lot.

So from the footprints, we can only roughly judge where the murderer is standing."

Xu Zheng frowned, it seems that the murderer still knows a little about the criminal investigation case, and knows that the destruction of the crime scene is really difficult to deal with, he glanced at the surrounding walls, spraying blue contrast agent everywhere, this is to take fingerprints, "Squadron Xu, is there only Zhou Mu's fingerprints at the crime scene?"

Xu Squadron was specifically watching Xu Zheng's homework this time, he wore a mask, shoe covers, and a hood, but the weather in the early stage of the rainstorm still made him sweat lightly, so he wanted to remind Xu Zheng to go through the procedure in a slippery manner, but he didn't know how to say it, "Yes, none of these fingerprints extracted by blue contrast agent are Miao Yu's, including the staircase wall.

If it weren't for the sporadic few half-missing footprints, it would have been true

I can't see that Miao Yu appeared at the scene of the crime."

Seeing Xu Zheng turn around and walk towards the wall, Xu Squadron wiped the sweat from his neck again, he didn't believe that Xu Zheng could find anything, because the experienced technical investigation colleagues of the city bureau came all over again, but they didn't find any substantive evidence.

So, he hurriedly asked, "What's the matter, you've discovered something new?"

Xu Zheng heard the slight impatience of the Xu squadron, but this was work, although it was stuffy, hot and smelly here, he still had to insist on finishing the test.

In fact, the blood stains on the walls are similar to those on the ground, because the unfinished building is full of dust, and there are also on the walls, Xu Zheng is holding a magnifying glass and a high-light flashlight, and the blood stains on the wall inch by inch.

Seeing that Xu Zheng had stood in front of the wall for ten minutes without moving, Squadron Xu still introduced him, "Xiao Xu, this piece of blood in front of you is Chu Yi's, and he has done a DNA test.

From the fact that the blood splattered onto the wall and then flowed down, it can be seen that it should be Chu Yi's head splashed onto the wall after being hit on the head for the second time."

Xu Zheng nodded, he continued to carefully observe this piece of blood, 24 hours have passed since the time of the crime, the blood has long been fused with the dust on the wall, after drying, it is black and purple, the area is not small, enough to be the size of a basin.

The blood did appear in the form of a spurt, which was consistent with the way the blood sprayed onto the wall after Chu Yi's head was beaten.

"Squadron Xu, is there only Chu Yi's blood on the wall? And the blood of Tong Yanjiang and Guo Jingqing was left on the ground?" Xu Zheng looked at the blood stains on the ground again, to be honest, he didn't find any evidence so far.

The sky outside was even darker, and the humidity of the air was greater, but it finally began to cool down a little, and Squadron Xu said patiently while wiping his sweat: "Indeed, we have also discussed, based on the results of the trace examination of the victim's bloodstains, it cannot be proved that Miao Yu is the murderer, nor can it be proved that it is Zhou Mu."

Xu Zheng walked to the place where the blood stained on the wall was, and gently touched it with his gloved fingers, "Squadron Xu, can I destroy this piece of bloodstain, don't worry, I only need an area the size of a palm."

Lao Xu's face was embarrassed, the scene of the crime must not be destroyed, at least he doesn't have this right, "Xiao Xu, if you call the Wan detachment, he agrees and we will continue to work."

Xu Zheng nodded, directly dialed Wan Haihong's phone, and told Wan Haihong on the other side of the phone his thoughts.

"You mean to say that you invented a bloodstain stripping water that wipes the upper layer of blood and reveals the lower layer of blood?" Wan Haihong was a little unconvinced, after the blood dried up, it was mixed with the soil, and it could not be separated by physical methods at all.

Xu Zheng insisted: "I can do an experiment for you, if it succeeds, how about you let me try?"

"Then you wait, I'll be there in 15 minutes."

After a while, Wan Haihong rushed over with Yan Zizhong and Zhang Yuqi, wanting to see if the blood stripping water effect invented by Xu Zheng was really effective.

But there is no dry blood here except for the crime scene, there is no way, it may also be Wan Haihong's trust in Xu Zheng, and finally let him operate directly.

Lao Xu opened his mouth and wanted to object, what kind of blood strips the water, what is the difference between this thing and water, can it really separate the outer layer of blood from the inner layer, and why does Xu Zheng think that there is a layer of blood under this piece of blood?

Of course, Xu Zheng didn't know what Squadron Xu was thinking, he was not untargeted, because he had observed this piece of blood for more than ten minutes, and found that some places were a little thicker, because this was the blood splattered out of Chu Yi's head, and it could be a little thicker, but there were only a few drops of other blood in this place.

It may be Chu Yi's, or Tong Yanjiang and Guo Jingqing's.

"Xu Zheng, whether you kid is sure or not, don't be blind here." Yan Zizhong was not at ease, so he asked him again, but thinking of the skull angiography invented by Xu Zheng, it seems that it is not a big problem to invent a blood stripping water now.

"Please rest assured, my product will definitely surprise you." Xu Zheng stopped talking nonsense and took out a small watering can from his bag, the liquid in it

Transparent, he lightly sprayed at the suspicious spots.

Then he took out Sister Xiaorui's hair dryer from her bag and started blowing it with hot air at this position.

Then I sprayed the blood stripping water a few more times, and then blew it with a hair dryer, good guys, the whole process lasted five minutes, and several people were huddled in the small crime scene, all sweating.

Finally, where he smeared, the black-purple dry blood exploded, and then under the blow of the hair dryer, a string of black-red blood was revealed, which was short-lived, and was wrapped in an outer layer of blood, and it had not yet oxidized.

Wan Haihong patted Xu Zheng's shoulder vigorously and patted him with a stumble, "Good boy, what kind of water is really useful."

Xu Zheng laughed, of course, if you peel off the upper layer of dry blood with water and alcohol, it will damage the few drops of blood below.

Wan Haihong praised Xu Zheng a few words, immediately pushed Yan Zizhong away, picked up the highlight flashlight, and personally observed the bloodstain.

As he observed, the more satisfied he became, and after a long time, Wan Haihong stood up laughing, "Sure enough, Skynet is restored and not leaked, isn't this evidence coming?"

It turned out that this black and red blood stain was obviously not splashed up, but the blood stuck to the stick was thrown onto the wall with the murderer waving the steel rod, and then according to the height of the blood traces, as well as the position of the murderer with this stick, plus, the height of Miao Yu and Zhou Mu is enough to judge who knocked out this stick.

Now all the people present are masters of technical investigation, Xu Squadron also reacted at this time, and looked at Xu Zheng with hot eyes, this blood stripping water is very useful, in the future.... Seeing that the 10,000 detachment was going to take measurements, he immediately took out the tape measure in his pocket.

Zhou Mu is only 1.7 meters tall, Miao Yu is 1.82 meters, according to their height, standing in the position of the murderer, and counting the length of the 80 cm steel rod, it can be completely deduced who hit the two sticks after Chu Yi fell to the ground.

That's right, after measuring it a few times, only when Miao Yu, who is 1.82 meters tall, wields a steel rod, can this bloodstain appear.

On the other hand, Zhou Mu, unless he increases his height by ten centimeters out of thin air, can he achieve this effect.

Zhang Yuqi's mouth was amazed, "Xu Zheng, to be honest, how do you know that there is something else under this piece of blood?"

Sure enough, they are all masters of criminal investigation, and they will definitely ask when they react, but Xu Zheng has already made an excuse, "You have already checked the crime scene N times, if I use conventional methods again, it will still be ineffective." I mentally simulated the actions of the murderer at the scene of the crime, and if there is any evidence that has not been found by us, then there is only evidence under the blood.

And, look at the stick of steel, the end of which is the thickness of a thumb, and is stained with thick blood, and the blood on the stick must be thrown against the wall between the swings of the murderer.

But no blood was found at the scene of the crime, so it could only be hidden underneath..."

For Xu Zheng's judgment, Wan Haihong was convinced, especially Xu Squadron, the current investigation and trace inspection were his old profession, and he was defeated by Xu Zheng at this time, he smiled and said: "This method can only be used by your Xiao Xu, we are not sure that we will not lose the blood below and strip off the blood above."

Wan Haihong nodded and agreed with Squadron Xu's statement, "Old Xu, you quickly ask your colleagues to come over and re-examine this bloodstain and try to find more clues."

He didn't mention the blood stripping water in Xu Zheng's hand, because this is Xu Zheng's own thing, and the detachment can use it, but the ownership must be Xu Zheng's, and if the technical investigation department wants to use this stripping water, they have to talk to Xu Zheng.

In any case, with this blood peel water, Xu Zheng can also apply for another practical patent.

Now that new clues have been discovered, Wan Haihong and they didn't stay here for long, so they hurriedly returned to the detachment and began to study and judge how to conduct the interrogation.

This kind of inspection report can be used as testimony for police interrogation, and can also be used as evidence for the procuratorate and the court to hear the case, so this time Xu Zheng's credit directly broke the deadlock in the case, otherwise, Miao Yu has never admitted it

, this really has to be in accordance with the legal principle of no doubt of guilt, and it is very likely that Miao Yu and Zhou Mu will not be tried for murder first.

Of course, now in the whole case, the information of the two murderers is still under investigation, and a comprehensive investigation is carried out from their company colleagues, wives, friends, etc., on the one hand, it can be seen that the murderer's psychological growth process can be seen, and on the other hand, it is also for interrogation.

In the conference room, Wan Haihong personally told Xu Zheng's new discovery in the conference room, and praised Xu Zhengzhong, listening to everyone's applause for him, Xu Zheng's heart was like the air in this air-conditioned room, it was really comfortable.