Advocate for the deceased

Chapter 481 The Mystery of the Cause of Death (25)

The fat man narrowed his eyes and stared at Zhou Hai.

"I don't know too much. I just cultivate talents for the center. Zhang Wenqi's technology is one of the best. Of course, it is not under the premise of my comparison."

Zhang Wenqi reached out and grabbed the fat man's sleeve.

"Master, let's keep a low profile!"

The fat man wanted to say something else, but seeing Zhou Hai raised his eyebrows and looked at him, he pursed his lips for a moment to silence, and the expression on his face became low-key and cautious.

"The claim that bleach damages DNA is mainly because its active ingredient is NACLO, which, when exposed to water, undergoes hydrolysis to form HCLO, which has strong oxidative properties.

This acts as a bleach, denatures the protein of the bacteria, and kills the bacteria.

So it has no effect on DNA. Bleach will coagulate and denature the protein, and the protein is the scaffold of DNA. The scaffold is qualitatively solidified, and the integrity of the DNA is naturally affected.

However, this does not mean that it cannot be extracted. In the past, it was impossible to extract because the technical means could not keep up.

But now you only need to extract the fragments, and then use the intercepted fragments for comparison and screening. If there are more than two fragments that completely overlap, it can be judged as the same person.

However, it is really not easy to actually operate it, and it requires a little luck and experience.

These water boots have been soaked in [-], but you can cut off part of the upper surface. If the deep folds of the heel are blocked by residue or mud, blood can be extracted even after soaking in [-] disinfectant.

Again, it depends on how lucky we are. "

After listening to Fatty's speech, Zhang Wenqi's eyes were full of little stars, even Zhou Hai who was on the side looked at Fatty.

It seems that those books are still helpful to him, and positively affect the people around him, Zhang Wenqi is like this, and so is Sister Zeng and Madman.

"Wow, the master explained it so clearly, I finally understand it this time!"

As he said that, he quickly took the brand new wallpaper knife and cut off the folds of the heel. At the moment of cutting it off, the fat man saw at a glance that there was a little blood red in the deepest gap of the heel.

Quickly grabbed the magnifying glass and moved closer, the small stones around seemed to block the blood into the gap, and the outside was blocked by grass clippings and mud, completely isolated.

The fat man smiled and couldn't see his eyes at all.

"I'm so lucky, I'll go buy a lottery ticket later."

Zhou Hai poked him, "Okay, you're lucky enough today, now use your remaining luck to find traces for me and go to the yard."

When the three of them came to the yard, there was indeed a flower pot the size of a water tank by the wall on the west side. When they came here before, Zhou Hai was covered by green vegetation, so he didn't pay attention to the details here. Only then did he realize that it was full of flowers. .

With a slight lift of his nose, he could smell a strong smell of insecticide. The fat man squatted beside the flower pot, pushing away the green vegetation. The circles of white spots on the edge of the flower pot were where the insecticide dripped and condensed. Mark of.

Zhou Hai who was standing behind couldn't see these details clearly, but seeing the fat man wipe it with a cotton swab, he knew that something must have been discovered. Zhou Hai just wanted to ask Zhang Wenqi to go to the door to have a look.

A sudden reflection made Zhou Hai a little dazzling, he walked towards the fat man, but the reflection disappeared.

"Fatty, Zhang Wenqi, move these flower pots away, something is dazzling just now!"

Zhang Wenqi was puzzled, "What?"

The fat man slapped him on the back.

"Do you know what this is called the sixth sense, sometimes it is more effective than a hundred surveys, let you move as soon as you move, return the goods after talking nonsense, and refuse to accept apprentices!"

Zhang Wenqi was startled, and bent down to lift a large one-meter-high flower pot, but the vines on the green plants were too stretched to move, so the fat man got up and cut the vines with scissors.

The branches on it fell down one after another, and took the big flower pot away. Zhou Hai walked over. The fat man and Zhang Wenqi had already stepped aside. Zhou Hai changed several angles, took another step back, and then walked forward.

Zhou Hai squatted down and moved a blue-and-white flowerpot away, and there were finger-thin and shiny silver objects appearing in the gaps of the flowerpot. This thing was more like a metal pen.

Both Fatty and Zhang Wenqi held their breaths. Although they didn't know what it was, seeing Zhou Hai's nervous look, they knew it must not be an ordinary carbon pen. Zhang Wenqi reacted quickly, and quickly handed Zhou Hai an evidence bag.

But Zhou Hai didn't answer it, he pinched the sides, picked up this thing and took a closer look.

The writing on it is worn out, but one line of English 'novo nordisk' can still be distinguished, which should be the Danish company Novo Nordisk.

Zhou Hai suddenly realized that among the products produced by this company, the most famous one is this insulin pen.

This kind of refill is a replaceable one, and there is half of the medicine left in it. Obviously, this is often used. At least most people will not prepare this thing. Looking at the wide injection volume set above, Zhou Hai narrowed his eyes.

so much?
"Haiko, what is this?"

"This is an insulin pen injector, and it is a very expensive brand. The pen refill inside can be replaced. There is less than half of it left. If the injection unit is set according to this setting, it will be enough for many days."

The fat man widened his small eyes, grabbed Zhou Hai's arm, and took a closer look at the insulin pen.

"Hazi, what do you mean, the murderer is carrying an insulin pen with him, maybe the murderer has diabetes, and this insulin pen is what he uses every day?"

Zhou Hai nodded, "This kind of insulin pen injection is almost painless. If you do other physical contact, or pierce when you are more excited, the person who is pricked will not pay attention to being pricked."

The fat man rubbed his chin and thought for a while.

Suddenly, he dragged Zhang Wenqi to stand in front of the flowerpot, and the two stood facing each other. He took out a carbon pen in his hand, glanced at Zhang Wenqi's height, and gestured towards him.

"Come on kid, hug me!"

Zhang Wenqi trembled all over, with a shocked expression on his face.

"What~
What are you hugging?

Princess hug? "

The fat man was amused, stood on tiptoe and slapped Zhang Wenqi on the head.

"I let you mess around, just to let you reproduce the situation. Why are there so many things, or should I find someone else?"

The two criminal policemen standing not far away subconsciously took a step back when they heard the fat man's words. The fat man glanced at them with warning eyes.

"Brother Xu, don't be angry, what do you say, I will cooperate with you!"

"Why are you so angry, do you remember the DNA extraction method I told you just now, repeat it to me, and then we hug while saying it."

Although Zhang Wenqi didn't know what Fatty was going to do, he started to retell the story seriously.

The fat man grabbed his clothes and asked him to approach him. Zhang Wenqi spread his arms and hugged the fat man. The fat man raised his hand and poked the back of Zhang Wenqi's head with a carbon pen.

Zhang Wenqi also stammered and finished speaking at this time, the fat man gave him a white look.

"Your memory is very problematic at such a young age, is that what I just said?"

Zhang Wenqi scratched his hair and recalled it, it seemed that he was right?
"That's what it says, that's right!"

Zhou Hai lifted Zhang Wenqi's hair, and sure enough, there were four or five black ink dots on the back of Zhang Wenqi's head, all of which were poked by the fat man just now, not to mention that the force was really similar.

"The fat man guessed right, it should be injected like this!"

Zhang Wenqi didn't understand yet, so the fat man explained.

"I just want to attract your attention. I poked the back of your head with a pen several times just now. Didn't you feel it?"

"I don't feel it, have you poked it?"

The fat man stopped teasing him, nodded and said:

"The force of poking is quite strong, Haizi feels that it is similar to acupuncture."

Zhang Wenqi snorted, and asked suspiciously:
"Then who held Lei Yu and injected him?"

(End of this chapter)