Advocate for the deceased

Chapter 619

The fat man lifted a backing board, quickly stepped on the platform at the edge of the bathtub, and walked to the position Zhou Hai was pointing at, the purple light in his hand illuminated the wall.

Zhang Wenqi closed the door, and Xiao Liang closed the blinds in the bathroom, so that the whole room was only illuminated by the purple light, and some traces appeared on the wall beside the fat man.

Following the traces, the fat man easily found a white thread, lifted it up with tweezers and observed it.

"Is this a thread that was pulled from the top of the thread glove?"

Zhou Hai looked at the position behind Fatty and waved his hand at him. Fatty stepped aside quickly, and all the traces on the wall appeared at this moment.

About one meter from the ground, there is a huge rubbing mark, and above the ceiling, there are many small cord-like rubbing marks, with obvious directionality.

Zhou Hai squinted his eyes, and the people beside him waited quietly with bated breath. The fat man knew that Zhou Hai must have thought of something.

"What's wrong, Haizi?"

Zhou Hai pointed to the marks on the wall and said, "There's been someone standing here!"

Several people were stunned, the traces on the wall couldn't be seen, and they didn't know why Zhou Hai thought so.

The fat man's first reaction was to pick up the backing board and look carefully at the table. After observing for a while, he suddenly stopped.

"Haizi is right. People have stood here. Although it has been cleaned, white traces can be seen. Zhang Wenqi took a sample of the traces here. Although there are no footprints, there are still some leftovers. Let's see what it is? "

Zhang Wenqi hurriedly started, the fat man retreated to Zhou Hai's side, rubbed his chin and looked towards the wall.

"Not to mention looking carefully, it seems that it is really a person standing here. The middle part is the trace of the buttocks rubbing, and the hair on it is left by sweeping the wall. With thread gloves, could it be that the murderer is standing here?"

Zhou Hai narrowed his eyes, "Measure, the distance from the table to the ceiling!"

Zhang Wenqi had finished taking the samples, and stood directly on the platform to measure the height.

"190 centimeters from the ceiling, and 175 centimeters from the ground where the hair brushes."

Zhou Hai looked at the big cat, "How tall is the husband of the deceased?"

"177 centimeters."

The fat man's small eyes widened, staring at Zhou Hai.

"You suspect the husband of the deceased? But there was indeed a white mark on his previous shoe prints. We won't know if it's the same substance until we test it."

Zhou Hai nodded, and his thoughts were the same.

"Come down, open the curtains, and the fat man will extract the sewer again!"

Although the fat man was unwilling, but this was necessary, he bent over and lay down in the bathtub.

Inside the bathtub, there are black carbonized residues everywhere, mixed with blood, which makes people sick.

The fat man twisted off the stainless steel plug at the sewer outlet, found an extra-long plastic stick with barbs and inserted it into the sewer, and the viscous substance and hair were hooked up.

Zhang Wenqi hurriedly continued. He just wiped it before. This kind of extraction was really disgusting, but he was a little surprised that the hair could be preserved.

"Hey, sulfuric acid didn't corrode the hair?"

The fat man rolled his eyes at him, "Did you pass chemistry? Forget it, the fat man will teach you a lesson!
Sulfuric acid is highly hygroscopic.

This ability increases with the concentration of sulfuric acid itself and the temperature.

This hygroscopic property can remove the oxygen and hydrogen in the organic matter in the form of water, leaving elements such as C, which is called carbonization.

If the concentration and temperature are suitable, the strong oxidizing properties of sulfuric acid can also oxidize C into CO2, and the organic matter will be carbonized when put into sulfuric acid, the effect is similar to combustion, and the sulfuric acid solution will turn black.

But not all organic substances are like this, some organic substances have a very stable structure, even sulfuric acid has no way to remove H and O.

In this case, sulfuric acid is powerless, so some plastic products can be used to hold concentrated sulfuric acid.

Human skin and organs are all organic matter. When they encounter concentrated or hot sulfuric acid, they will naturally be carbonized and dehydrated, causing burns, just like the face and hands of the dead.

But hair belongs to the dead cells of the human body, and its main component is protein, which is also hygroscopic, and the dead cells contain less water, and there is oil on the surface of the hair. These oils form a protective film on the surface of the hair to prevent the hair from contacting with sulfuric acid. .

The oil itself belongs to saturated alkanes or olefins with few double bonds, which are relatively stable and resistant to acid, so the hair is not so easy to be burned by sulfuric acid.

But this is not absolute. If you put a little hair in very strong sulfuric acid, it will be charred over time.

It's just that the time is long and the reaction is slow, and the hair in the sewer has not been soaked in sulfuric acid for a long time and has been diluted with water, so the hair is still intact, but the hair follicles may be damaged. "

Big Mao gave Fatty a thumbs up, "Fatty is awesome, even though I didn't understand, I think what you said is very reasonable!"

The fat man gave him a blank look. Seeing that Zhou Hai had a dark face, he quickly stopped the ink and threw the things into the evidence bag.

"Ahem, pack your things, have you checked Zhang Wenqi's other rooms?"

Zhou Hai poked the fat man, the fat man was startled, and looked at Zhou Hai timidly, thinking he was about to be criticized.

"That's right, the theoretical knowledge is very good, but have you sampled the position where the hair brushed against the wall?"

The fat man quickly grabbed a few cotton swabs, jumped onto the table next to the bathtub, and wiped the trace where the hair had rubbed off four or five times.

The moment he looked up, he found a reflection on the ceiling, and the fat man paused.

"Give me the purple light, there are fingerprints here!"

Hearing Fatty's voice, Zhang Wenqi quickly shone the purple light towards the ceiling.

Sure enough, six clear fingerprints were found here, and the fat man quickly extracted the fingerprints, and tried to push the gusset away, and it did so easily.

Holding a bright flashlight in his mouth, he looked up. There was a lot of dust inside, but there was a square place that was very clean, obviously something had been hidden here.

Zhang Wenqi had already marked and packed several things before the fat man jumped down.

"There was something hidden in the gusset, but it's gone now. Please note that the size of the object is 12 x 6 centimeters. The height is unknown, but the maximum height of the gusset is within 25, so it must be within this height."

Zhou Hai had already walked to another room, checked around and found nothing else, and then went to the entrance again. The big cat thought that Zhou Hai was going to leave, and prepared to open the entrance door.

Zhou Hai stopped his movement, leaning against the floor-to-ceiling shoe cabinet on the floor, there was a row of white suede slippers neatly placed, obviously these were guest slippers, as if they were getting ready for important guests.

Only, there was a pair of slippers with brown patterns that were casually thrown aside and listed together.

Obviously these are the slippers Zhang Wenqi was talking about, but why are the shoes here?
Zhou Hai picked up the slippers, the soles of the shoes were very clean, without blood stains or carbonized black marks, the shoes did not look like they were worn in the bathroom.

Zhang Wenqi and the others followed. Seeing Zhou Hai looking at the shoes, Zhang Wenqi quickly explained:
"A part of the inside of the shoe was cut and sent for inspection, and the outside was also extracted, but nothing was found. Team Huang said, try to keep the scene as it is, so that you can understand the state of the scene more intuitively when you come back!"

Zhou Hai nodded, and opened the shoe cabinet. Zhou Hai was stunned for a moment. The push-pull cabinets on both sides were shoes on two walls.

It is roughly estimated that there are hundreds of pairs, and they are arranged according to different heights and colors. Zhou Hai squinted his eyes for a moment after looking at it. Zhang Wenqi was a little puzzled when he saw Zhou Hai's expression. Somewhat bottomless.

"Boss, what's wrong?

Is there anything wrong with this shoe cabinet? "

(End of this chapter)