The locksmith brought by the police unlocked all the doors of Professor Pei's house.

It's also amazing that all the rooms in the house are locked in broad daylight. I don't know if it was the lock that Feng Guanghua put on before his death, or the lock that the murderer put on before leaving.

It's hard to say who put on the locks in the other rooms, as the door lock of the second bedroom at the scene of Feng Guanghua's death, it must have been the murderer.

The secret room is a murderer who claims to be smart. Often this kind of trickery will only delay the pace of the police to solve the case, but in the end, they still can't escape the fate of being arrested.

After checking all the corners of the house, the police confirmed that there were no living people in the house except for the police.

Looking further at the spatial structure, comparing the room type and the usable area, it can also ensure that there is no secret room that can hide people.

The forensic doctor examined Feng Guanghua's body, and only the wound on his head was on his body, which should be a fatal wound.

Rust residue was collected from the head wound, and the murder weapon was confirmed to be a blunt iron weapon.

After the scene records were completed, the body was transported back to the police station for further investigation, while Xie Jingchen stayed at the scene to check and collect fingerprints and other evidence.

The doorknobs of several doors have been collected, and the comparison results have not yet been released.

After Xie Jingchen walked around the house, he went to the corridor.

Let's not talk about the secret room of the room, that is not the most critical issue, the most critical thing is that in the eight minutes before and after Xiao Zhao left, the murderer had to complete a series of actions such as killing, creating an escape room, and escaping.

Eight minutes, the time is very tight, and even killing people is difficult to complete.

After Xiao Zhao returned to the downstairs of Pei's house, he didn't see anyone going up and down the stairs.

When did the murderer go upstairs and when did he enter Pei's house?

Did the murderer quickly go upstairs to kill people after seeing them leave Pei's house, or was he already hiding in Pei's house before they left?

Did the killer kill someone and leave in eight minutes? Where did he leave from?

Xie Jingchen went to the community security guard to transfer the supervision/control.

Although it is said to be an old community, the security system has just been updated, and there are cameras that can take pictures of the various corridors and exits of this building from the side.

It took an hour before and after, Xie Jingchen watched the surveillance video at a normal speed and then watched it slowly.

The supervision/control video shows that from the time Xie Jingchen and Xiao Zhao went downstairs and exited the corridor, to the time Xiao Zhao came back and stood outside the corridor, no one entered or exited the corridor during this period.

The murderer didn't leave the hallway? So how did he leave after killing someone? Is it so hard that people can disappear out of thin air?

Xie Jingchen returned to Pei's house downstairs from the security office with questions.

First, find the location of the camera, and judge the monitoring/control range of the camera according to the video you watched before.

After walking around, I found that although the camera could capture people entering and exiting the corridor, it could not capture the stairs further down from the corridor.

From the stairs, if you don't go out of the stairs, head behind the stairs to the private garage on the first floor.

Not all of the private garages are connected to the staircase, only the two garages marked 201 and 402 on the door number lead to the stairwell, and a "back door" is installed in the stairwell.

This kind of old community without elevators, only the second to sixth floors have residents, and the first floor, that is, the ground floor, is the garage. Garages are purchased by the head of the household at voluntary expense, and not every household has them.

Some garages were not bought for parking, but were renovated and converted into small apartments for rent or for the elderly.

Xie Jingchen went to knock on the doors one by one, but no one answered, so he immediately recorded the situation and sent someone to check the situation of the two garages, and at the same time went around to the other side of the building to check the main entrance exits of these garages.

When the information in the garage was found out and the head of the household was called, the fingerprint comparison results also came out.

The two garages that can be connected in this corridor correspond to the heads of households 201 and 402 respectively.

The residents of 402 are a family of three, and the garage was converted into a house to take care of the family's sick grandfather. Because the old man has bad legs and feet, it is inconvenient to go up and down the stairs, so the old man lives in the garage on the ground floor.

Now, the family of 402 is not at home, the husband is at work, the wife accompanies the grandfather to the hospital for a check-up, and the child is going to school.

The garage room of 402 is locked with a roller shutter door in the front, and the door leading to the corridor at the back is specially equipped with a tight security door, and a camera is installed in the home to check the situation of the elderly at any time.

Their cameras can prove that no outsiders have been in or out of the house.

The head of the 201 household is a speculator, who takes out a loan to buy a house, rents it out after renovation, and then uses the rent to pay off the mortgage, and then sells the house when the house price rises to make money.

The garages of 201 and 201 under his household have been rented out as the school district of the key middle school, which is very close to the school and convenient for students to go to and from school.

The flipper kept his own spare keys, but he was not in the local area and only gave the contact information of the tenant to the police.

Neither tenant can be reached at this time, and it is estimated that they will not be able to be contacted until after working hours.

The fingerprint comparison results also came out, in addition to the fingerprints of Pei Chengjing and Feng Guanghua in the room, the fingerprints of Zhou Yang and Su Ye were also compared.

Zhou Yang died yesterday, he must be ruled out of suspicion, it can't be a ghost asking for his life.

As for Su Ye, his suspicion is still quite big, because his fingerprints are basically all over the Pei family.

On the doorknob, on the table and chair, on the toilet, and even on the knife handle in the kitchen, there are fingerprints left by Su Ye.

However, there is a strange point, that is, there are no fingerprints on the handle of the iron pan used for stir-frying.

After inspecting the iron pot inside and out, the police found that there were blood stains on the bottom of the iron pot, and at the same time, the rust on the bottom of the iron pot matched the rust on the deceased's head.

The murder weapon was found.

When the iron pot was found, it was placed on the stove. It had been simply cleaned, at least the fingerprints on the hands had been erased, and most of the blood stains on the bottom had been wiped off.

It's just that because the materials at the bottom of the iron pot are very stubborn types, it is difficult to clean them up in a short time, so they found the residue.

As soon as the fingerprints were compared, the police went to contact Su Ye.

Su Ye was the same as when Xie Jingchen looked for him last time, and it took a long time before he came out of the laboratory.

However, he has numerous physical evidence that can prove that he has not been out of the laboratory today.

Regarding the police's question of "why can your fingerprints be extracted at Pei's house", Su Ye answered unhurriedly.

"Professor Pei is my mentor, and when he passed away, I naturally had to visit my wife, and even help my wife with the funeral."

He also said: "Mr. Pei has no children in his life, I am the same as his own son, Pei's family is equivalent to my family, there are fingerprints, what's so strange?" ”