Following the voice, Zhou Ning walked upstairs quickly, and Xu Dayuan followed.

Da Zhao held up a physical evidence bag, which contained an L-shaped thing, black but like metal, and the broken end had marks of slashing.

Zhou Ning recognized that this was a doorknob, although it was a very simple shape, but this process must be very expensive, after all, the fire did not lose the paint and deform.

However, it seemed to have crocodile skin-like lines on it, Zhou Ning took the bag, held it up and looked at it carefully, and instantly thought of the scars on Dong Chengwen's hands.

"The doorknob in the master bedroom? Mark it and go back to test the skin tissue on it, if Dong Chengwen didn't lie, then this is the skin of his hand. ”

Xu Dayuan glanced at it, with a look of disdain, and then stared at Da Zhao.

"You're making a fuss about seeing something like this?"

Da Zhao looked bitter on his face, stretched out his hand towards Xu Dayuan, and pointed around.

"This has been searched more than once in a carpet way, just look at these footprints, whether it is the rescue firefighters, or the police who investigated later, no less than 40 people have entered the scene, and the effective evidence that can be found has been searched again, this is a fish that slipped through the net, shouldn't you be happy?"

Xu Dayuan didn't speak, and saw Yang Xuetong cleaning up the pile of garbage in the center of the bedroom, and then looked at it, Yang Xuetong explained while sorting and selecting:

"Da Zhao is right, there was little evidence at the fire scene, the process of fighting the fire was the destruction of the scene, it was searched many times, the garbage was screened, and the ground was cleaned, so there was no valuable evidence at such a scene."

Xu Dayuan rubbed his hair, he knew that it was difficult, but he didn't expect that there was nothing left at the scene, but Zhou Ning didn't speak, staring carefully at the dark bedroom.

The bedroom is more than 30 square meters, wider than the living room of ordinary people, and there is a window on the south side and the east side, but they have been completely exploded, which shows how fierce the fire was at that time.

The bed is placed on the north wall, and now only the metal frame remains, and even then you can see the original luxurious state of the bed.

The bed was also the place where the burn was the worst, the mattress was only a yellow skeleton, and on the embedded bedside table next to it, there were broken wine bottles and glasses on the spot.

There was a most burning area on the ground, roughly judging by the charred black form, it was a rectangle, with a large area, extending from the front of the cloakroom door to the bed, where there was no floor left, and the concrete floor had been bursting, and it seemed that there was a thick wool carpet here.

Next to the bedside table is an open cloakroom, near the bedroom door side, where there is no door, it should be a bathroom.

The bathroom is in good condition.

Zhou Ning walked to the cloakroom, there was a window here, and in the middle was a dresser, the decoration here should be a wooden structure, so it burned even more, there were falling metal rods everywhere, and even falling cement blocks, and half of the head.

Walking to the position of the dressing table, Zhou Ning's feet slipped, as if he had stepped on something, he lifted his foot, and the shoe cover was scratched, revealing a shining thing on the ground.

Zhou Ning squatted down and gently wiped the ashes, and the shards of glass that had melted were exposed, and Da Zhao followed behind Zhou Ning, seeing what he had found, he hurried over to take pictures.

Immediately squatted down, gently prying with tweezers, the floor has been completely carbonized, no need to effort, this floor with melted glass was pried up as a whole, carefully packed into the physical evidence bag, Da Zhao took a closer look.

"Could it be that the cloakroom started to catch fire? I remember that the melting point of glass is 500 degrees, and it can reach 400 degrees after 10-15 minutes at a typical fire scene, but there are too many combustibles here, and it is not impossible. ”

Zhou Ning stared at the glass in Da Zhao's hand, and then looked around.

As his feet rubbed against the floor, a lot of sparkling glass was revealed, extending to the door of the cloakroom, and at the corner of the doorway and the edge of the baseboard, a piece of glass the size of an egg was shining green.

Da Zhao rushed over, quickly took a picture of the glass on the scale, and then pried it up and put it into the physical evidence bag, looking at the dressing table, after all, there were many broken bottles and cans here, and many of them were also burned to a half-melted state.

"Green, I don't know what kind of cosmetic bottle? After a while, when Sister Liu came back, I asked her to see if she could recognize her. ”

Zhou Ning stared at the window, measured the distance, hugged his arms and pursed his lips, Da Zhao looked puzzled.

"What's wrong Zhou Xiaozhou, do you think this is not a bottle of cosmetics?"

Zhou Ning pointed to the position of the first piece of glass and waved his hand at Yang Xuetong.

"Yang trace, come over and measure the straight-line distance from this position to the window?"

Yang Xuetong took a tape measure and measured the distance.

"The window is here at a distance of two meters and eight in a straight line."

"Go ahead and measure the distance from the window to the opening of the cloakroom door."

The movement here also attracted Xu Dayuan, who leaned over and looked at the glass in Zhou Ning and Da Zhao's hands, with a puzzled face.

"It is common for glass to break at the scene of a fire, Zhou Xiaozhou, what do you think is the problem?"

Zhou Ning pondered for a moment, and then said:

"This needs to be confirmed with the fire department, I remember doing a question, what can the traces of glass damage in the fire scene prove? I answered this question incorrectly, so I remember it very deeply, and the correct answer is:

It can be proved that the direction of force, the time of fragmentation, the intensity of the fire, and the temperature of the fire site, and the glass at the general fire scene is broken, mostly because the high temperature increases the internal pressure, which explodes towards the window, even if there are glass fragments in the room, it will not burst so far. ”

As he spoke, Zhou Ning walked to Da Zhao's side, took the green glass evidence bag, asked Yang Xuetong for a magnifying glass, and sent it to Xu Dayuan, asking him to take a closer look at it.

Xu Dayuan raised the magnifying glass with doubts, the edge of this green glass was no longer sharp, it was obviously a little melted, and only a few small dots could be seen.

However, in the middle position, a letter and four numbers can still be seen carefully, it is a capital b followed by 2009, of course, it may also be 2008, because that part is very ambiguous.

Zhu Xingxing leaned over, the young man's eyes were good, she was not afraid of the scene, and asked directly:

"B2009 What does this mean?"

Da Zhao came over, quickly took a closer look, and patted his head.

"I took it for granted, I didn't look carefully just now, this is a beer bottle, that is, the beer bottle of our Qindao No. 2 factory, there seems to be some national standard stipulation, it is necessary to distinguish the type and year of beer bottles produced before and after, so the beer is required to be marked B, and then add the year of production, but how did this beer bottle come here?"

Xu Dayuan threw the physical evidence bag to Da Zhao, his brows furrowed.

"There is a possibility that someone threw a beer bottle with gasoline at this window, which is equivalent to an incendiary bomb, with the blessing of combustibles, and there is no door in the cloakroom, the fire will instantly engulf the whole room, and if people do not react in time, they will not be able to escape."

Zhou Ning nodded, this is what he suspected, picking up the half of the brick, Zhou Ning turned it upside down.

"Molotov cocktails will shatter if they hit the glass directly, but it's much easier to smash the glass with a brick and throw the Molotov cocktail in from the defect."

The location of the glass fragments flying was too far, and it was at the same angle as the wine bottle fragment, and it was thrown directly towards the door of the cloakroom from the window, but the bricks smashed the glass, and the Molotov cocktail was thrown in, and the sound was not small, why didn't the deceased Fang Hua and her daughter wake up?

According to Dong Chengwen's rhetoric, Fang Hua was hungry, and Xiaomi was also noisy and hungry, so he went out to buy food, and he only came back after going out for twenty minutes, and it was already burning here, could he have fallen asleep? And slept quite deadly?

Yang Xuetong looked embarrassed, he had just searched here, but he found the melted glass and didn't take it seriously, but he didn't expect Zhou Ning to find a problem on this.

"Team leader, criticize me, I didn't investigate carefully just now."

Zhou Ning shook his head.

"Thinking too much, we took over such eucalyptus, most of them have been screened by others many times, and the problems that can be found are all probability events, so now clean up the locker room, mark the location of all the glass, and mark the transparent glass and the green glass separately."

Zhu Xingxing leaned over and divided a few small signs.

A few people quickly cleaned up the scene and began to place signs, from the window to the cloakroom door, and finally found that there was some on the floor of the bedroom, but it was mixed with the cement below.

Xu Dayuan went out, he went to send someone to check the backyard of the villa, and called Liu Yufei, since he went to find all the materials, then he also asked for the monitoring that had been copied before.

If someone throws a gasoline bottle on the north side of the villa, there must be traces around it, and the surveillance will also record it.

Seeing that they were busy, Zhou Ning went downstairs.

The layout of the first floor is more open, a hall of nearly 100 square meters, the kitchen and dining room are glass curtain walls, but the view is wide, but now the glass is basically broken, revealing a door behind the kitchen, and the position leads to the north side of the villa.

Walking to the location of the restaurant, there were a lot of toppled chairs here, and there was a lump of things buckled on the ground, Zhou Ning used a brush to clean up the ashes on it, and found that it was an upside-down cake tray.

Zhou Ning gently lifted the tray and found that the cake had been completely corrupted, but there were traces of black and brown on it, it could be seen that this chocolate cake was not big, only about eight inches, and there was a card with a fork on the ground next to it, which said Happy Eighth Wedding Anniversary of Dear.

Zhou Ning put the cake tray and the fork card into the physical evidence bag.

You can go down the stairs to the minus floor, and next to the stairs is a room, the door is open, Zhou Ning opened the door and looked inside, there were a lot of fishing gear hanging inside, as well as children's cars, and a men's sunscreen clothing was thrown on the platform on the side, and there was a standard configuration for forensics and photography next to it.

It seems that it was left by the people who came to investigate the scene before, but thinking of Dong Chengwen's story, Zhou Ning came to his senses, maybe he found a gas ticket in the pocket of this dress.

Zhou Ning didn't stop, and went directly down the stairs to the negative floor, where there are many rooms, and they were almost not affected by the fire, but there are water stains on the walls in some places, and there are billiard rooms, video rooms, study rooms, laundry rooms, and nanny rooms.

Enter the garage from the negative floor, but there is also an anti-theft door next to the roller shutter door, Zhou Ning pushed open the anti-theft door and found that it was connected to the underground parking lot.

At the moment when he turned around, Zhou Ning paused, and his eyes were attracted by a picture on the wall.