The next morning, the sky was filled with morning glow, and there was a lot of water vapor in the air outside. It looked like it was going to rain heavily.
As for Xu Zheng, he received a call from Zhang Yuqi at five in the morning, asking him to get up early and go to Fuzhong Smart City.
It turned out that the experts of the city bureau's spot inspection and trace inspection yesterday found no evidence at the scene. No, Yan Zizhong suggested that Xu Zheng give it a try. After all, Xu Zheng's technical investigation skills were obvious to all.
However, there were no results from the spot inspection and trace inspection last night. Wan Haihong and the others discussed it. If it didn't work, they would focus on the interrogation. Maybe Miao Yu himself was not rigorous in his words and would make mistakes on his own.
There is no other way. After all, the existing evidence is not good for Zhou Mu, and both Zhou Mu and Miao Yu deny each other that they killed someone.
After Xu Zheng answered the phone, he did not set off directly, but went into his small studio. He wanted to prepare a potion. With the advanced technical investigation technology and knowledge given by his current system, he happened to have a skull angiography at home. The ingredients for the agent, plus other materials he bought online before.
Enough to prepare a blood stain stripping water.
His small studio was not equipped with air conditioning, and when he came out, he was already soaked to the skin. The weather in Changming City is like this. It is extremely hot in the summer, and when it rains heavily, people feel like they are living in water vapor. , everything feels wet when touched.
At six o'clock, Xu Zheng arrived at the crime scene in Fuzhong Smart City. At this time, Squadron Leader Xu of the Technical Investigation Brigade was waiting here, "Sorry, Squadron Xu, I'm late."
Lao Xu was a kind-faced technician. He wiped the sweat from his forehead when he heard this. "Young people like to sleep in. This job is not too rushed, as long as the results are available before the interrogation."
Xu Zheng put on a mask, gloves, shoe covers, and a headgear and picked up the tools for technical investigation. "Let's get started. In this weather, you'll get sweaty even if you move casually, so it's better to stay in an air-conditioned room."
While the two were talking, work officially started. Room 7012 is now equipped with several high-power lighting lamps. It is as bright as daylight. Working in such an environment, it is impossible to get too hot.
Before Xu Zheng started, he felt his gloves were soaked, "Squadron Xu, can you tell me about your previous work?"
Lao Xu nodded, not hating that Xu Zheng didn't do his homework when he came, "Look, these three humanoid outlines on the ground are not far apart. Plus the blood oozing from the wounds on their corpses, we can tell that the children were young at that time. Yanjiang and three others were kneeling here. Tong Yanjiang was slightly obese, and because he was older and hadn't eaten for several days, he was hit 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 body and was hit on the temple.
As for Chu Yi, because he was young, and because he was not only a lover of Zhou Mu and Miao Yu's wives, but also engaged in various personality-destroying behaviors, Miao Yu and Zhou Mu took the most "care" for him, and used various methods on him. There are also a lot of them.
You see, there are three places where blood fell automatically. This is because Chu Yi received three blows on the head. The first blow was when he was knocked down as soon as he got up, the second blow was when he was lying on the ground and was hit. The third blow, Someone turned his body over, probably to make sure he was dead, and made some repairs.
We can't tell who the murderer is from the footprints near the body. The main reason is that the body has drag marks, which damaged Zhou Mu and Miao Yu's footprints a lot.
Therefore, from the footprints, we can only roughly determine where the murderer stood. "
Xu Zheng frowned. It seemed that the murderer still had some knowledge of criminal investigation and the destruction of the crime scene. It was really difficult to deal with this situation. He glanced at the surrounding walls, which were sprayed with blue paint everywhere. Agent, this is to take fingerprints, "Squadron Xu, are there only Zhou Mu's fingerprints at the crime scene?"
Squadron Xu was specifically watching Xu Zheng’s homework this time, so he wore a mask, shoe covers, and headgear. However, the weather before the heavy rain still made the fat man sweat, so he wanted to remind Xu Zheng to walk quickly. Procedure, but I don’t know how to explain it properly, “Yes, none of the fingerprints extracted by these blue contrast agents belong to Miao Yu, including those on the stairs wall.
If it weren't for a few scattered half-missing footprints, it would really prove that
Miao Yu appeared at the crime scene without knowing it. "
Seeing Xu Zheng turn and walk towards the wall, Squadron Xu wiped the sweat from his neck again. He didn't believe that Xu Zheng could find anything, because experienced technical investigation colleagues from the city bureau came all over and found no substantial evidence.
So, he asked hurriedly: "What's wrong, Xiao Xu, have you discovered a new situation?"
Xu Zheng could hear Squadron Xu's slight impatience, but this was work. Although it was stuffy, hot and smelly here, he still had to insist on completing the inspection.
In fact, the blood stains on the wall were similar to those on the ground, because there was dust everywhere in the unfinished building, and there was also dust on the walls. Xu Zheng took a magnifying glass and a high-beam flashlight and shone the blood stains on the wall inch by inch.
Seeing Xu Zheng standing in front of the wall for ten minutes without moving, Squadron Xu introduced him, "Xiao Xu, the blood stain in front of you is Chu Yi's, and he has undergone DNA testing.
From the blood splattering on the wall and flowing down, it can be seen that it should have been splattered on the wall after Chu Yi was hit on the head for the second time. "
Xu Zheng nodded. He continued to observe the blood stain carefully. It had been 24 hours since the incident. The blood had long merged with the dust on the wall. After it dried, it turned black and purple. The area was not small, covering an area of The basin is so big.
The blood did appear to be spraying, which was consistent with the way blood sprayed onto the wall after Chu Yi was hit on the head.
"Squadron Xu, is there only Chu Yi's blood on the wall? And the blood of Tong Yanjiang and Guo Jingqing is left on the ground?" Xu Zheng looked at the blood stains on the ground again. To be honest, he couldn't find any evidence so far. .
The sky outside was darker and the air was more humid. However, it finally started to cool down a little. Squadron Xu said patiently while wiping his sweat: "Indeed, we have also discussed that based on the trace test results of the victim's blood, it cannot be proved. Miao Yu is the murderer, but it cannot be proven that he is Zhou Mu."
Xu Zheng walked to the bloodstain on the wall again and touched it gently with his gloved fingers, "Lieutenant Xu, can I destroy this bloodstain? Don't worry, I only need an area as big as a palm."
Lao Xu looked embarrassed. The crime scene must not be destroyed. At least he did not have this right. "Xiao Xu, why don't you call Team Wan? If he agrees, we can continue the work."
Xu Zheng nodded, dialed Wan Haihong directly, and told Wan Haihong his thoughts on the other side of the phone.
"You mean you invented a blood stain stripping water that can wipe away the upper layer of blood stains and reveal the lower layer of blood stains?" Wan Haihong didn't believe it. After the blood dried, it was mixed with the soil. Together, they cannot be physically separated at all.
Xu Zheng insisted: "I can do an experiment for you, Team Wan, and if it succeeds, how about you let me try it?"
"Then just wait, I'll be there in 15 minutes."
After a while, Wan Haihong rushed over with Yan Zizheng and Zhang Yuqi to see if the blood-stripping water invented by Xu Zheng was really effective.
But there was no dried blood anywhere except the crime scene. There was no other way, maybe because Wan Haihong trusted Xu Zheng, so he finally let him operate directly.
Lao Xu opened his mouth and wanted to object. What is the difference between blood and water? Can it really separate the outer layer of blood from the inner layer? Also, why does Xu Zheng think there is another layer under this blood stain? blood?
Xu Zheng, of course, didn't know what Squadron Xu was thinking at this moment. He was not aiming for nothing, because he observed the blood stain for more than ten minutes and found that it was a little thick in some places, because it was the blood spattered from Chu Yi's head. The only reason why it can be thicker is that there were a few drops of other blood in this area.
It might be Chu Yi's, or it might be Tong Yanjiang's and Guo Jingqing's.
"Xu Zheng, are you sure about it? Don't act blindly here." Yan Zizheng was worried and asked him again, but thinking of the skull angiography agent invented by Xu Zheng, and now he has invented a blood stripping solution, it seems It's not a big deal either.
"Please rest assured, leader, this product of mine will definitely surprise you." Xu Zheng stopped talking nonsense and took out a small spray bottle from his bag. The liquid in it
It was transparent, and he sprayed it lightly on the suspected area.
Then she took out Sister Xiaorui's hair dryer from her bag and started blowing it with hot air at this location.
Then I sprayed the blood stripping water several times, and then used a hair dryer to blow it. My dear, the whole process lasted five minutes. Several people were crowded in the small crime scene, and they were all covered in sweat.
Finally, where he applied it, the piece of black and purple dried blood exploded, and then under the blow of the hair dryer, a string of black and red blood was revealed. This was only for a short time, and it was wrapped by a layer of blood outside, and it had not yet occurred. Oxidized look.
Wan Haihong slapped Xu Zheng on the shoulder hard, making him stagger, "Good boy, this water is really useful."
Xu Zheng laughed, of course. If you just use water and alcohol to peel off the top layer of dried blood, it will 100% damage the few drops of blood below.
Wan Haihong praised Xu Zheng a few words, then immediately pushed Yan Zizhong and others away, picked up a high-beam flashlight, and observed the blood stain personally.
The more he observed, the more satisfied he became. After a long time, Wan Haihong stood up with a loud laugh, "Sure enough, Skynet has not leaked anything. Isn't this proof?"
It turned out that this black and red blood stain was obviously not spattered, but the blood that stuck to the stick and was thrown to the wall as the murderer swung the steel rod. Based on the height of the blood trace, there was also the murderer's stick. The position, coupled with the height of Miao Yu and Zhou Mu, were enough to determine who struck the blow.
Everyone present now is a master of technical investigation. Squadron Xu also reacted at this time and looked at Xu Zheng with hot eyes. This blood stripping water is very useful. In the future... I saw Squadron Wan doing measurements. , he immediately took out the tape measure in his pocket.
Zhou Mu is only 1.7 meters tall, and Miao Yu is 1.82 meters tall. According to their heights, standing where the murderer committed the crime, and taking into account the length of the 80cm steel rod, it can be completely inferred that Chu Yi fell to the ground. Who hit the stick?
That's right, after several measurements, it turned out that only Miao Yu, who was 1.82 meters tall, could produce this bloodstain look when he wielded a steel rod.
On the other hand, Zhou Mu would not be able to achieve this effect unless he grew ten centimeters taller out of thin air.
Zhang Yuqi exclaimed, "Xu Zheng, honestly speaking, how do you know there is something else beneath this bloodstain?"
Sure enough, they are all experts in criminal investigation, and they will definitely ask when they react, but Xu Zheng already had an excuse, "You have already checked the crime scene N times. If I try to use conventional methods, it still won't work. I just thought in my heart We simulated the actions of the murderer at the crime scene. If there is still evidence that we have not found, it will only be the evidence under the blood.
Moreover, look at the steel rod. The thumb-thick end is covered with thick blood. The blood on the stick will definitely be thrown to the wall when the murderer swings it.
But there was no blood thrown away at the crime scene, so it had to be hidden underneath..."
Regarding Xu Zheng's judgment, Wan Haihong and the others were convinced, especially Squadron Xu. Spot investigation and trace inspection were his old skills. At this time, they were defeated by Xu Zheng, a layman. He chuckled and said: "This kind of Only you, Xiao Xu, can use this method, and we are not sure that we can peel off the blood on top without losing the blood on the bottom layer."
Wan Haihong nodded and agreed with Squadron Xu's statement, "Old Xu, please quickly ask your colleagues to come over and re-examine this blood stain to try to find more clues."
He didn't mention the blood-stripping water in Xu Zheng's hand, because it was Xu Zheng's own thing and the detachment could use it, but the ownership must belong to Xu Zheng. If the technical investigation department wanted to use this blood-stripping water, it would have to work with him. Xu Zhengtan.
No matter what, with this blood-stripping water, Xu Zheng can apply for another practical patent.
Now that new clues have been discovered, Wan Haihong and the others did not stay here longer, and quickly returned to the detachment to start studying how to conduct an interrogation. As for the clues Xu Zheng discovered, the technical investigation team will come to a conclusion later.
This kind of inspection report can be used as a testimony in the police interrogation, and can also be used as evidence in the procuratorate and court hearing the case. Therefore, Xu Zheng’s credit directly broke the deadlock in the case this time. Otherwise, Miao Yu would never admit it.
, in accordance with the legal principle of acquittal, it is very likely that Miao Yu and Zhou Mu will not be tried for murder.
Of course, the information about the two murderers in the entire case is still under investigation. A comprehensive investigation is conducted from their company colleagues, wives, friends, etc. On the one hand, the psychological growth process of the murderer can be seen, and on the other hand, it is also for the purpose of interrogation.
In the research and judgment conference room, Wan Haihong personally told Xu Zheng's new findings in the conference room and praised Xu Zheng in the public. Listening to everyone's applause for him, Xu Zheng felt as comfortable as the air in this air-conditioned room. .
