novice forensic medicine

With excitement on his face, Liu Yongxin kept waving to a criminal policeman beside him, motioning him to call someone quickly.

"Call someone in the intercom, and let all the people from the technical department come over."

The criminal policeman nodded hurriedly, and repeated what Da Zhao said into the intercom. After a while, everyone ran over, and Liu Yongxin gasped and squatted beside Da Zhao.

"What did you find?"

"Footprints, although the footprints are not complete, but this pattern is too special. I think it is the same as the one found in Xiaoqu's flower bed. And looking at this location, this kid has a very good look. He said it was a pit from urine. I found it really looks like it. Uncle Liu, you Take a look, according to the location of the footprints, this person should be peeing in the direction of the hillside."

Lao Yang also squatted down, took off the mask, and sniffed it carefully.

"It's really urinating. This man is urinating very vigorously. There used to be dry grass here, but it was all washed away."

Liu Yongxin looked at the distribution of footprints, squatted down imitatively, and suddenly realized:
"This man squatted down to urinate in order to avoid noise and make it easier to hide, so part of the withered grass was washed away, and his sight was not good at night. He didn't notice it. As for the footprints, compared with the ones in the flower beds in the community, I feel even more that this The height of a person is above 180, otherwise he would not have done this."

"Uncle Liu, why don't you continue searching?"

Liu Yongxin waved his hand, turned around and looked in the direction of Qinda Road.

Looking at it from this position, there is just a stone blocking it in front of it. This is a perfect shelter from the wind, which can reduce the spread of the smell. Liu Yongxin suppressed the surprise in his heart and waved his hands towards the people around him.

"From here to the location of that stone, we searched by ourselves, looking at the traces of broken branches, footprints, even cigarette butts, garbage, and everything. I think we are close to the location where the murderer was guarding. It’s the perfect place to observe.”

Da Zhao nodded, and hurriedly called Sun Gaotie and the others to come over, wishing to use a magnifying glass to carefully observe everything below. Each small flag was crossed, and Fang Mu and the others ran over. Liu Yongxin held the magnifying glass and knelt on one knee.

There are seven footprints stepped on the ground, and the sense of direction and rubbing are preserved. Liu Yongxin analyzed them carefully.

"This person's shoes are size 44. Based on his steps and the depth of footprints, he is between 180 and 185 in height. The outer heel of his left foot is severely worn, and his right foot bears weight. Normally, most people bear weight on their right foot. But this person's left foot is splayed and worn on one side of his left foot. I think this person can be considered left-handed.

In addition, there is an old injury below the knee joint of the left leg, which causes knee valgus, and fast walking restricts the movement, forming a compensatory gait, which may not be found during slow walking and running, but fast walking or laterally moving steps, uncontrolled Sometimes, the existence of leg damage will be clearly felt. "

Da Zhao leaned over excitedly.

"I found a urine sample. This person still has some problems with his left leg. Isn't this closer to the truth? Then look for any clues left?"

Speaking of helping Liu Yongxin up, several people walked behind the stone. Yang Xuetong and Wang Henjian had already climbed up. The driver Lao Wang not far away picked up an L-shaped cigarette butt with tweezers. This cigarette burned for three hours. Two-thirds, the rest of the head was pressed and piled up into a lump.

Look at the position of the stone, and take a closer look at the logo on the cigarette butt.

"Zhao Henjian, look at this cigarette butt. I think it was left by someone standing on a rock, holding the cigarette butt to extinguish it, and flicking it away with his fingers. There are tooth marks on it, and maybe fingerprints can be found."

Da Zhao climbed a handful and a half of rocks, hurried down to the driver Lao Wang, put the cigarette butt in the evidence bag, and handed it to Liu Yongxin. Lao Yang and Wang Henjian on the rock also began to look for the place to extinguish the cigarette butt. Find three or four charred spots on the left edge.

"I found it. It should be pressed here to extinguish it, and then throw away the cigarette butt. Uncle Liu is not a professional killer. How could he leave such a thing?"

Liu Yongxin had already raised the cigarette butt and looked at it carefully, with a hint of comprehension on his face.

"It's true that people are professional, but I think the tobacco he smoked was added. It looks like a normal Hanako, but there is a pinhole in the mark under the filter of the cigarette butt. One is so decisive, how many people can lurk in it?" People who leave no traces when they are young can leave such things, either by restraining the pain, or by taking the initiative to smoke because of the onset of D addiction.”

Da Zhao nodded, his small eyes widened.

"Uncle Liu, so this person is related to Fang Shengping's case. When we found the waiter Zhang Meng who was hidden by Liu Liwei, she was smoking cigarettes with such ingredients, and the injection positions of the brands were all the same."

"Not necessarily, put the things away, and then look for other residues, if not, then go around the stone to find the way this person went down."

Needless to say, several people started to move, Fang Mu yelled at everyone, and temporarily stood by for orders. After all, such a detailed survey was done more meticulously by professionals, and being able to have a direction is already the biggest gain.

Not long after the search was over, they followed Yang Xuetong and Sun Gaotie who opened the way ahead, and they found a path down the mountain. This is a ditch-like area at the foot of Fushan Mountain. There are few weeds on the ground, only gravel and gravel, and there are not many footprints. It can be regarded as the nearest place to reach the middle of the two communities.

After reaching the bottom of the mountain, he took photos of the footprints he found again. After collecting the traces, Da Zhao yelled at the top to let everyone get out of the way. He carried the survey box, pressed the timer, and quickly ran down from the top, rushing to two neighborhoods Put it on the parking belt, and glanced at the time, it only took more than 90 seconds.

Panting, Da Zhao looked at Liu Yongxin.

"Uncle Liu, the time it takes to get down here is shorter than we guessed. I don't carry a suitcase. I think even if I carry a bag, I can get down in a minute. From here, I went around to the south side of the villa, climbed over the guardrail, and arrived at the flower bed. It takes up to 1 minutes.

Zhou Xiaozhou didn't drive fast. He drove up from the intersection of Qinda 10st Road, found a parking space, and then returned home. It took [-] minutes to start. It seemed that the murderer had already figured out Zhou Xiaozhou's habits and had plenty of time to prepare. "

Liu Yongxin nodded.

"It seems that we have found the suspect's ambush location. This is not enough. After the injury, he did not show up on the surveillance. Then, did he go up the mountain on the original road, avoid the crowd and surveillance from the mountain, and then find a vehicle to leave?"

Liu Yongxin's guess was bold, but Zhao Xinli and the others nodded after listening.

"Indeed, I don't think it's possible to leave the campus. After Lao He found out about Zhou Ning, he sent him to the hospital and called Bureau Xu to inform him that someone was on duty immediately. He wanted to escape the scene without anyone noticing it. It has not been captured by surveillance.

He has only one path, which is to return to the lurking point on the original road, and then go up the mountain in the opposite direction, and climb the Fushan Mountain to the north from here. "

Liu Yongxin nodded.

"Tell Xiaoqu what you think. You can search the surrounding surveillance. Of course, it is not limited to short-distance roads. Da Zhao's idea is indeed possible, but don't forget that the murderer has one foot. Affected, but climbing the mountain may still be difficult."

Da Zhao was silent, and Liu Yongxin patted him on the shoulder. At this time, everyone's enthusiasm could not be dampened, so he quickly exhaled and said:

"Zhou Ning and his family have collected samples of the traces left by the arrows on their house, right?"

"Well, it has been collected, but the test results have not yet been read."

"That's good, let's withdraw."

In the laboratory on the fourth floor of the Technical Department.

Peng Shinian kept typing on the computer, while Xiao Qu watched his typing and also stared at her notebook.

Liu Yongxin and the others entered the room, but they didn't notice it. When they walked to the side, Peng Shinian suddenly realized that someone was approaching. He was so frightened that he shivered, and the stack of papers beside him fell to the ground.

Liu Yongxin picked it up and looked at it twice. It was all in English, and there was also a picture marked in English.

"What's the progress on your PSP?"

Xiao Qu approached with a smile, obviously very excited.

"Let's not talk about the process, it's very cumbersome anyway, but we found out through several reports and comparisons between the fishery department and the health department that there is a marine biology laboratory in Xinghua, which used to be the biological laboratory of Qindao Ocean University of branches.

They have collected a large number of scallop samples in the past year, and the collection location is the origin of the three high-content PSP scallops mentioned in the previous report. These are their purchases, up to 23 Ton.

Moreover, among the raw materials they purchased, 99% are the gland parts of scallops, and only a small amount of whole scallops are only used as reserved samples. According to the equipment reported by their laboratory, the extraction of PSP can be completed. "

Da Zhao blinked, estimating the weight in his mind.

"23 tons, 23000 kilograms, a laboratory uses such raw materials, how many trips does the car need to make to pull scallops? It has to be shelled, and so much scallop meat needs to be processed, can a laboratory do it?"

Peng Shinian shook his head with excitement on his face.

"It sounds like a lot. In fact, the content of scallop meat in 23 tons is less than one-tenth. We calculated it based on 2300 kilograms. Not all of these are used for extraction. After all, PSP mainly exists in Ezo scallops. inside the gland.

Glands account for about 1/12 of the meat, which is 191 kilograms. General laboratories can do extraction, and the purchase is not completed at the same time. After all, this is not artificial breeding. The collection season is between June and December last year. . "

Liu Yongxin interrupted Peng Shinian, he knew that Peng Shinian was an academic, finding these things was more exciting for him, and what he wanted to know was not this.

"Xiao Qu checked this laboratory, who is in charge? Are they a branch of Qindao Ocean University, or what?"