novice forensic medicine

It's no use Zhou Ning went over, Da Zhao had already run over holding a brick.

Zhou Ning took a closer look. The brick in Da Zhao's hand was similar to the broken bricks thrown from the roof. They were all covered with moss and looked very old, but beside the moss, dark brown blood stains could be seen.

"Very good, keep looking. There are a lot of sundries on the roof. I have checked inch by inch. By the way, which direction is the surveillance camera facing? Where was the body found?"

Da Zhao found a hand-drawn picture, and at a glance, he knew it was on the car. Liu Yufei asked He Hongjian to dictate, they drew it, and compared the directions. Da Zhao pointed to the easternmost location of Building No. [-] on the north side of the gate guard. said:

"The No. [-] camera is installed on the east wall of the No. [-] building. According to He Hongjian, the video record given by the police is the picture of this camera. However, after identification, it is the shoes that fell. In the morning, He Hongjian's wife found the shoes. .

As for the body, it fell on the west side of Building No. [-], blocked by a row of attached rooms below, and fell into the small open space. In the morning, someone had to open the door of the attached room to get the battery car, and only then did He Jiahong's body be found. "

"That is to say, there is no camera facing the west side of Building No. [-] and the annex, right?"

Da Zhao nodded.

"There are three cameras in total. One is across the road from the gatekeeper, facing Building [-], and the other is also in that position, but facing the doors of several units in Building [-]. Even if someone passes by below, they can still see the camera. Not quite sure."

Zhou Ning walked towards the west side of the platform. There was no blood on the ground here. The deceased's head was injured, and blood was left on the bricks, but nothing was found at the scene. Isn't this the first scene?

"Did you check it carefully? Did you spray the luminol reagent?"

Da Zhao sighed.

"I've checked everything. I've used seven bottles of luminol reagent, and I found a drop of blood on the edge. I don't know what Lao Yang found."

Lao Yang shook his head. Before coming here, Zhou Ning knew that if professionals were involved in concealing the case or forging the scene, it would be very difficult in the investigation process, but he still didn't expect that there was nothing useful.

"I didn't find anything else, but I did a test with a test strip. On the doorknob of the upper platform and on the road to the west, there was a large area of ​​chlorine-containing disinfectant, and according to the traces left on the ground, here It has been carefully scrubbed."

Following the direction of Lao Yang's finger, Zhou Ning followed quickly and squatted down to check. Sure enough, the handle on the west side of the doorknob was darker, and near the edge on the south side, there were uniform marks left by brushes on the ground, all of which were fan-shaped marks. Extends to the westernmost gully.

Lying on the edge of the roof, Zhou Ning looked down. The rainwater pipe broke four meters from the ground, and it seemed to be in disrepair.

"Go down the high-speed rail, ask the driver Lao Wang to find you a ladder, go up from the bottom, check the location where the rainwater pipe is broken, whether there is any splash, especially look for traces of blood and various liquids, and take samples. As for the top, scrub Lao Yang and Da Zhao also took samples from the locations they passed by."

Sun Gaotie ran down quickly, Lao Yang was a little puzzled.

"Didn't the boss say that after scrubbing with 84 disinfectant, the blood and DNA will be destroyed. What's the point of collecting it?"

Zhou Ning shook his head.

"Among chlorine-containing preparations, 84 disinfectant is the easiest to obtain. It is true that it can clean up blood stains and destroy DNA and protein, but it only causes protein denaturation in DNA. However, DNA fragments can still be extracted, and of course such fragments can also be compared."

Upon hearing this, both of them were a little excited, and Da Zhao patted his head and suddenly remembered.

"I remembered, the team doctor of the previous figure skating team used this method at that time, and we still found the DNA in the residue, but it was a sewer, and there were a lot of things hanging, this"

Lao Yang pulled Da Zhao away, Zhou Ning didn't know that there were few traces left here, but it also showed a problem, perhaps this was not the first scene where the dead were persecuted.

Zhou Ning dialed Xiaoqu's phone number, and the other party answered the second call.

"Director Zhou, don't worry, the monitoring has been deleted. The technique is very professional. I'm trying to restore it, but it will take a little time. As for the video sent by the clock bureau, I watched it. It was indeed at 23:37. When something falls, after slowing down, it can be confirmed that what He Hongjian said is true, this is a shoe.”

"Well, let's recover as soon as possible. Have you checked the school's surveillance?"

"Look, the situation is basically the same. The original surveillance files that were saved were all deleted, and I found that there was a corner surveillance that happened to be able to capture a corner of the Yanye Community. I don't know if it was a follow-up adjustment or it has always been like this. I They're all trying to recover."

"Okay, I have news."

After talking Zhou Ning hung up the phone. At this time, Da Zhao and the others had finished sampling, lying on the edge of the platform, looking down at Sun Gaotie, he had already climbed to the place where the rainwater pipe broke. Using a knife to scrape the paint on the surface of the building, it seems that the paint has been scraped off for a long time, and the finishing box in his hand is almost half full.

Zhou Ning rubbed his nose, it seemed that he had to go down quickly, otherwise this guy could peel the wall from there to the first floor.

"Da Zhao hurried down and told Sun Gaotie to collect some, and then peel it off, the residents here will complain."

Da Zhao looked puzzled, glanced at it, and almost burst out laughing.

"This kid can do it, I will use this trick next time, but it is easy to find any leftovers."

Zhou Ning stared, and Zhao ran away in a hurry.

With a sad expression on his face, Lao Yang tore off a layer of gloves, and the strong smell of chlorine-containing preparations was pungent.

"Boss, the sampling is done, but I look at it, it doesn't seem to be the first scene, the incident happened on March 3th

The lowest temperature in Xinghua City that day was minus 1 degree, and the wind was six to seven. How addictive, the wind is cold on the roof, what are you doing? "

This sentence reminded Zhou Ning that he had thought about it before, since there are so many tenants in this community, maybe there is one household, which is the place where the real violence is committed.

"Let's go, go downstairs first, you guys go to see where the deceased fell and see if there are any residues, I'll go to Sister Fei, the Xinghua City Bureau hasn't issued a survey report on the scene, this process is a bit slow. "

Lao Yang nodded, and followed behind Zhou Ning, carrying a survey box and a box full of samples, and went downstairs quickly.

On the way, Zhou Ning took a look. Except for the second-floor Xihu rented by He Hongjian, the other houses did not change the original style of anti-theft doors. Connecting to sewers, moving house, unlocking locks, repairing appliances, you name it.

As soon as he went downstairs, he saw Liu Yufei approaching. Zhou Ning hurriedly followed Liu Yufei to a place where no one was gathered.

"Neither the Xinghua City Bureau nor Director Zheng came over, nor did they send a survey report?"

Liu Yufei shook her head.

"I called and said that someone would send it right away, but Director Zheng said that he had gone to a company, and he called the police continuously. He called 110 six or seven times in the morning. He heard that a mental patient rushed in after being drunk. Assault, chopping people around with a knife."

Zhou Ning glanced at the time, it was only 12:07.

"Six or seven times, it means that the police were called very early. This man drank so early. Is this for breakfast?"

Liu Yufei frowned and nodded slightly. It was obvious that the alarm was true and false. It was self-evident. At this time, the fifth middle school was starting to dismiss, and people in school uniforms were walking into the community one after another.

At the same time, a police car drove straight in, its siren roaring manically, attracting everyone's attention. Several half-grown children were running and jumping in the community. Even if their parents dragged them, they were almost hit by the car.

A policeman came down cursing, as if he was going to accuse the woman who was taking care of the child. He stretched out his hands, his fingers turned into palms, and scratched and teased the child on the head.

Then he held a file bag and searched for the target. In fact, Liu Yufei was very recognizable. The woman was wearing a police uniform, and her aura was so strong. When she found Liu Yufei, this person ran to the front and handed the file bag to Liu Yufei.

"I'm sorry Liu Da, I was delayed on the way. I am Liu Mo, the deputy captain of the criminal police team of the Xinghua City Bureau. This case is determined to be a suicide, so there are not many materials left, and it is not easy to find. This is the investigation report."

Zhou Ning glanced at the deputy captain of the criminal police team, who looked in his 30s. Although he was talking anxiously, there was a smile on his lips. He smelled of cigarettes all over his body. The coats were all improvised, with the collar turned inside out, and there was still dust from the seat belt on the right shoulder.

It seems that it was delayed on purpose. I smoked cigarettes on the road, and they were such high-end cigarettes. I was sitting in a new police car, but usually no one used the seat belt of the co-pilot. I was sent to contact the higher-level task force, and I was so foolish. This person is by no means an ordinary person.

Liu Yufei glanced at it, then handed the portfolio to Zhou Ning.

Zhou Ning flipped through it. The survey report was simply shockingly simple. There were only two pages in total. The first page was the survey findings and survey results. There was a lot of nonsense, and only one sentence was useful.

After the on-site investigation, it was found that the deceased stepped on the footprints on the edge of the roof platform. No suspicious objects were found at the scene, and there was no abnormality around the deceased. It was determined that the deceased committed suicide and fell to death.

The next page is a hand-painted scene map, on which is the state of the top floor, and the location of the footprints. A comparison photo of the footprints and the soles of the deceased is clipped. Lying on the ground on his back, his arms were stretched out at a 45° angle towards the south side, and his rigor was very obvious.

Zhou Ning opened the file bag and rummaged through it.

"No autopsy report?"

Liu Mo patted his head, as if he had just remembered, he hurried back and ran towards the police car, took out another portfolio from the back seat, and ran back again.

"Look at my brain, I was only thinking about the investigation report, and forgot about the one given to me by forensic doctor Zhang."