novice forensic medicine

Chapter 196 Second Site Survey
Da Zhao nodded.

"It is confirmed that the deceased is Tan Ran. This is part of the inspection report, and there are still some unfinished."

Zhou Ning took the report and read it carefully.

The bloodstains found at the scene belonged to Tan Ran. Blood footprints, blood fingerprints, blood splashes, blood pools, all these results came out. As for the other DNA at the first scene, only Xing Xiaoli’s DNA was collected. It seems that the murderer hoped that the police would Suspicion leads to Xing Xiaoli.

However, after looking through it, the test reports for the hand saw, kitchen knife and wire did not come out, which surprised Zhou Ning.

"Sister Cui didn't say why she didn't complete the test?"

"Speaking of which, although there are bloodstains of the deceased on these pieces of physical evidence, the ingredients of 84 disinfectant were found on several things, and they were found in the cracks. Sister Cui said that these things may have been sprayed before use. 84 disinfectant.

She wants to try it out to see if she can extract DNA fragments. After all, most people know that 84 can damage DNA after watching criminal investigation dramas, but Sister Cui said that what is just free radical oxidative damage, although it cannot be recovered, but the fragments inside can be extracted . "

Zhou Ning nodded.

"Talking about the degree of separation from the dose is all hooliganism. If it is just sprayed, there will be residues in the gaps. Even if it is soaked in disinfectant, if there is grease blocking the liquid, residues can be found inside.

Of course, as Sister Cui said, even if it is destroyed, some DNA fragments can be obtained, but this requires a lot of collection and extraction, the workload is very heavy, and it also requires a little luck. Let's see if Xu Da is so lucky. "

"What do you say to me?"

Following the sound, Xu Dayuan pushed the door open and came in, his eyes were a little bloodshot, but he was in a good state of mind, it seemed that he had discovered something.

Big Zhao grinned.

"How dare we talk about you behind your back? Sister Cui said to see how lucky we are. I want to extract a few more times to see if I can find other things. After all, these things have been sprayed with disinfectant before use, so It’s not done to remove what’s left of it.”

Xu Dayuan nodded, after all these people were so serious, he was still moved.

"I'll call Section Chief Cui in a while, and thank her very much."

"You just thank you with red lips and white teeth? You don't know the truth at all."

Seeing Xu Dayuan stare, Zhou Ning hurriedly said:
"Surveillance sent over?"

Xu Dayuan hummed to Big Zhao, and then looked at Zhou Ning.

"I got the video last night and sent it to Xiao Qu. The monitoring is very unclear. Several people from the technical department have been busy with Xiao Qu all night. Let's go and watch it together."

The three went upstairs together.

In the laboratory, it was smoky, and Xia Momo was coughing continuously while wearing a mask. Da Zhao hurried in and opened the window, and kicked the two people from the technical department and Xiao Zeng.

"Why do you have such a big heart? Teacher Xia is here. You can't rest for a few big smokers. If you want to smoke out, this room looks like alchemy. Don't come to the laboratory in the future."

After a meal, Zhou Ning and Xu Dayuan didn't stop it. Zhou Ning was really dissatisfied. The first priority of the laboratory is to test the application of the software, and the second is to assist Zhou Ning and the others in the investigation of the case. None of them are The people in the bureau are polite to help, and they can't come here like the uncle.

Xu Dayuan coughed and looked at Xiao Zeng. Xiao Zeng was so embarrassed that he was about to die, so he jumped over.

"Boss Ni is here. The monitoring on September 9th, 6th, and 7th has been repaired here. We are looking for people frame by frame."

Da Zhao grinned, leaned over and bumped Xiao Zeng on the shoulder.

"Stop fooling your bosses, and search frame by frame. Xiaoqu has experience. This software can screen the surveillance video, and then analyze all the personnel. Finally, it needs to manually compare the time and characters."

Xiao Zeng scratched his head, Xu Dayuan pushed him away.

"On Tan Ran's mobile phone, the last call was recorded at 9:7 on September 12. It was the package introduction of the mobile company. We have already checked this and found the call recording. We are sure that he answered it.

So the focus of the investigation was on the 7th and 8th. Did anyone find out who went out with a suitcase?In addition, what time did she leave on September 9? "

With this question, Xiao Zeng got stuck, and looked at Xiao Qu as if asking for help.

"I just found it, and I have taken a screenshot to save it. Tan Ran left on the afternoon of September 9th, carrying a small suitcase."

Saying that, Xiao Qu has already found a video clip, click to play.

Above, the marked time is 15:41. Tan Ran pulled a red suitcase, came out from the unit door, wore a red baseball cap, and made a phone call while walking.

Xiao Qu then opened more than a dozen pictures on another display screen, all of which were screenshots from surveillance, and almost everyone was holding a suitcase inside.

"These are all the people who came out with suitcases from September 9th to September 7th."

Several people gathered around the screen, Xu Dayuan looked at it, frowning.

"There is no gray suitcase of the same style?"

Zhou Ning stared at the screen. The suitcases carried by these people were not small, but it seemed impossible to put a 29-inch suitcase inside.

"Is there Xing Xiaoli in here?"

Without using Xiaoqu to identify, Xu Dayuan has already pointed to a person and said:

"This is Xing Xiaoli. He left with two suitcases."

Zhou Ning took a closer look. Although the picture is not clear, he can still feel Xing Xiaoli's thinness. It is true that at this height, if he wants to be a male pair skating athlete, his physical strength is not good enough. Similarly, with his body size, it is also a bit difficult to dismember and transport. difficulty.

"Building No. [-] of Enbo Community, can you see it with this surveillance?"

"As far as I can see, the easternmost side is the wall, so I will go out of the complex directly, and the door of the unit is on the north side, so I can't throw the box out of the window, there is a person stuffed inside."

After saying this, Xu Dayuan was also stunned. Then he took out his mobile phone and found the satellite picture of the street. The easternmost side of Building No. [-] is next to a small road and next to a hotel. The hotel is quite high, forming a narrow passage here, and You can go out on both sides of this long and narrow road.

"It seems that it is a good way to transport it out of the window. I don't know if there is surveillance behind the hotel."

After speaking, he looked back at Xiao Zeng, who nodded quickly.

"I'll go now."

Xu Dayuan thought about it and waved his hands.

"Let's go together, Zhou Xiaozhou, you will bring people to investigate the first scene for the second time. We will take people to check around to see if there is surveillance to get this location, and check the vehicles on both sides of the road. After all, the best way to transport the corpse is to Vehicle transfer."

After half an hour.

Zhou Ning and the others have arrived at Building No. [-] of Enbo Community. The car has already circled the small road outside. Sure enough, the east wall is close to the edge of Building No. [-], while the south side is not a wall, but an iron fence. , and the window is five or six meters away from the fence.

Several people went upstairs, at the door of 202, a policeman stood here, and when he saw Zhou Ning and the others coming up, he nodded quickly.

"Forensic Doctor Zhou, you are here!"

Zhou Ning nodded with a smile.

"Wang Ying didn't come back to live yesterday, did she?"

"The leader said that everyone uniformly requested to live in the temporary room in the gymnasium, and they were not allowed to leave."

This answer is quite satisfactory. After all, throwing boxes through the window is impossible in Xing Xiaoli's room. The only way to do it is through the window of the bathroom on the east side. Of course, it can also be 301, 401, or 501, except for those without east windows. 101, all of these can be done.

However, if these floors are thrown down, it is easier to attract the attention of others.

Thinking that they didn't stop, several people had already entered No. 201 directly.

"Da Zhao checked the bathroom, Yang Xuetong went to check the two bedrooms, pay attention to blood and fingerprints, forget about the shoe prints on the ground, mainly to see if there are any traces of the suitcase being pulled."

Yang Xuetong went to the master bedroom with his things, and Da Zhao opened the door of the bathroom. The layout here is exactly the opposite of that of 202. The windows are not big, and the width when fully opened is 65 cm.

Da Zhao leaned forward, and after measuring, he pushed down the screen window, and with a click, the screen window rolled up.

As the screen window was rolled up, there was a burst of dust, and Da Zhao poked his head out of the window. There were two dirty scratches outside the window, which were very obvious. It was so dark that it was impossible to see what it was. Da Zhao wiped it with a wet cotton swab, then threw it into the reagent bottle, and it instantly turned pink.

"Blood!"

"Well, it's blood, let's take a sample!"

This discovery, to Da Zhao, was like a shot in the arm. He took a sample excitedly, then leaned out and looked left and right. On the outside of the window, he found a fingerprint, but this fingerprint was not the abdomen. , After Da Zhao collected it, he held it up for Zhou Ning to see.

"This comparison is difficult. I can see that there are no traces left by the fingertips."

Sure enough, there was a round fingertip mark between the fingerprints of the two thread gloves. Obviously, the thread gloves were torn during the process of transporting the box, and the murderer left this mark without paying attention.

"Comparisons can be made. If there are no special features, there is a high probability of similar textures at this location, which cannot be used as the main evidence."

Da Zhao sighed, he was always in a good mood, Zhou Ning's words could not hit him.

"Don't worry about it, as long as we find clues, that's progress."

Zhou Ning nodded, and Yang Xuetong came over.

"Team leader, there are a lot of fingerprint information in these two rooms. I have already collected them, but except for the fluorescent reaction on the door lock handle, no blood was found anywhere else."

Zhou Ning nodded again.

"The murderer can accurately know everyone's work and rest time, enter and exit this unit at will, and even has the keys to 201 and 202. He is right-handed, has certain anti-reconnaissance capabilities, has strength, and is an adult male."

Da Zhao said from the side:
"When I called Wang Ligang and the others to understand the situation, he answered the phone and opened the door with his right hand. This is a subconscious action and cannot be deliberately changed. According to your image, he is also the object of suspicion?"

(End of this chapter)