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Yang Luo stood there and looked down, with no scars on the surface. (Please search for the fastest novel website!) Then slowly squatted down, because Li Zuoqun was lying there on his side, his upper body chest and face were almost on the ground, and he couldn't see the wound, but according to his experience, Li Zuoqun should have been pierced by a sharp weapon in the heart, or the major artery in the throat was cut, otherwise there would not be so much blood on the ground.

Huang Pingyi and Zheng Damin saw Yang Luo checking the body there, and hurriedly walked over.

Zheng Damin asked, "Secretary Yang, do you see something?" ”

Liu Hai's death case, especially the contest between Yang Luo and Sun Yunfeng in professional knowledge at that time, Zheng Damin heard about it. Later, he also personally examined the body of Liu Hai, and he didn't see the symptoms that Yang Luo said. While waiting for the results of the forensic autopsy, He Dabao suddenly let the truth come to light, which had to make Zheng Damin admire Yang Luo in his heart.

He is the director of the county public security bureau, and Yang Luo used to be the director of the county public security bureau. So when he saw Yang Luo checking Li Zuoqun's body, he hurriedly walked over and asked. After all, Li Zuoqun is the secretary of the county party committee, and he died suddenly, whether it is a murder or an accident, as long as the cause of death is not investigated for a day, then he will be under a lot of pressure.

Yang Luo didn't answer him, but touched the blood on the ground with his fingers.

"Looking at the blood clotting process, death should be between one and two hours." After speaking, he picked up the cola in Li Zuoqun's hand, then shook it, poured it out a little, and there was actually ice ballast.

At this time, the criminal policemen who were inspecting the scene also gathered around, and a middle-aged man who was nearly forty years old and carrying the rank of third-level police inspector looked at Zheng Damin suspiciously.

"Director, this is ......"

Zheng Damin raised his finger and shushed, and the middle-aged man closed his mouth.

Yang Luo took the Coke for a while, put the Coke back in its place, then stood up and said, "Director Zheng, have you examined the wounds of the corpse?" ”

Zheng Damin nodded: "The wound is in the throat, as if it was pierced through the artery by some sharp weapon." ”

Yang Luo nodded, squatted down again, and turned Li Zuoqun's body over, only to see that Li Zuoqun's throat had a penetrating wound more than an inch wide and deep. Then he picked up Li Zuoqun's other hand to check it, and stood up again after a while.

"Did you find anything?" Yang Luo looked at Zheng Damin and the middle-aged man.

The middle-aged man asked, "What do you mean?" ”

Yang Luo said softly: "A pull ring." ”

The middle-aged man was stunned: "I didn't see it." ”

The corners of Yang Luo's mouth pursed, he walked to the refrigerator, opened the refrigerator, and there were some vegetables in the refrigerator, and there was nothing else. Yang Luo opened the freezer again, only to see that there was still a Coke in it. I took it out and pinched it with my hand, it was as hard as a stone, and it was obviously frozen.

Yang Luo threw the Coke back and closed the refrigerator door, and looked down at the ground next to the refrigerator, where there was still a box of Coke, but it was not a canned bottle, but a plastic bottle.

Yang Luo lifted the Coke box with his feet, and then looked up at the woman who was still crying.

"Are you Secretary Li's wife?"

The woman sobbed and said, "My name is Tang Huizhen." ”

Yang Luo asked without any expression on his face: "When did you have an accident with Secretary Li, and where were you at that time?" “

Tang Huizhen said: "I went out to buy vegetables at four o'clock, and when I came back more than an hour ago, I saw that Lao Li had an accident, and then I called the police." ”

Yang Luo asked, "Secretary Li likes to drink Coke very much?" And it's still ice? ”

Tang Huizhen nodded: "Lao Li said that drinking Coke can refresh you, especially Ice Coke." ”

Yang Luo didn't ask anything more, but looked at Zheng Damin: "Have you notified the forensic doctor?" ”

Zheng Damin said: "Noticed. After speaking, he looked at his watch, "It should be almost there." ”

Yang Luo took out a cigarette and lit one, took a deep puff and said, "Wait a minute!" ”

Huang Pingyi asked, "What do you see?" ”

Yang Luo smiled slightly: "Let's wait for the forensic doctor to come over." ”

Huang Xinxin couldn't help but say: "Boss, just look at your expression, you must know that something must have appeared, hurry up and talk about it." ”

Yang Luo shook his head: "I'm not sure, I'd better wait for the forensic doctor to come." ”

Although everyone present wanted to know what Yang Luo had revealed, there was no way for him not to say it.

Zheng Damin asked, "Captain Han, are there any clues?" ”

Han Gengqiang said: "No! ”

At this moment, two women in white coats walked in outside, the older one was in his thirties, and the younger one was twenty-five or sixteen years old, carrying a metal box in his hand.

Zheng Damin saw the woman and hurriedly said, "Xiaoliang, you are here." ”

Liang Minjia nodded expressionlessly, came to Li Zuoqun's corpse and squatted down, and checked Li Zuoqun's corpse.

"There were no obvious external injuries other than the throat." After speaking, he raised his hand, "Ni Ni, give me the evidence box." ”

The girl standing next to her put the metal box on the ground and opened it.

Liang Minjia put on gloves, then took out a scalpel and cut the wound on Li Zuoqun's throat, only to see a shiny metal object exposed.

Liang Minjia took the tweezers again and clamped out the metal object, which was actually a pull ring of canned Coke. Everyone was stunned when they saw it, and then they looked at Yang Luo in unison. Just now, Yang Luo kept looking at the Coke in Li Zuoqun's hand, and asked the middle-aged man if he had found a pull ring. It seems that he already knew that the wound on Li Zuoqun's throat was caused by a pull ring. But how could this be, how could a pull ring kill Li Zuoqun.

"How so?" Liang Minjia looked at the pull ring on the tweezers and muttered softly.

Yang Luo glanced at the bloodstained ring, greeted Huang Xinxin, and walked out.

Zheng Damin was anxious: "Secretary Yang! ”

Yang Luo stopped: "Something?" ”

Zheng Damin said embarrassedly: "Secretary Yang, you should know what's going on." ”

Yang Luo nodded: "Yes, but what can this be?" Investigating the cause of Secretary Li's death is your policeman's business, and it seems that it has nothing to do with me. ”

Zheng Damin was even more embarrassed, and scolded in his heart: "Damn, if I knew how that pull ring ran into Li Zuoqun's neck, I would still ask you what you were doing." ”

Huang Pingyi said helplessly: "Say, what are the conditions." "If the cause of Li Zuoqun's death is clarified, his life as a county magistrate will not be easy.

Yang Luo grinned when he heard Huang Pingyi's words: "Secretary Li had an accident, but some things can't end because of the death of some people." ”

Huang Pingyi's face was full of black lines, and he understood the meaning of Yang Luo's words, Li Zuoqun was dead, and the investigation of Li Zuoqun would definitely be lightly put down. And Yang Luo didn't want to let Li Zuoqun go just because he died, but let the above have to investigate. But this kid didn't want to make trouble with him because of the investigation of Li Zuoqun, but let him come forward.

Huang Pingyi gritted his teeth and said: "If the city really stops the investigation, I will write a report and hand it in, but if the city does not agree, then there is no way." ”

Yang Luo smiled: "You are the county magistrate, as long as you hand in the application, I think the city will definitely consider your opinion, and then I will work harder, and this matter will continue." ”

Huang Pingyi gritted his teeth with hatred, and scolded secretly, this little fox is really cunning, and actually pulled him into the water.

Yang Luo didn't look at Huang Pingyi's eyes that were enough to kill him, but glanced around: "Aren't you very strange, how could a pull ring run into Secretary Li's neck." ”

Everyone nodded in unison, and even Liang Minjia hurriedly nodded. She has been a forensic doctor for seven or eight years, and she has never encountered such a bizarre thing. In fact, not only him, Zheng Damin has never encountered it.

Yang Luo said: "Then I will teach you a lesson." After speaking, he took a puff of cigarette, "The lower the temperature of water below 4 degrees Celsius, the larger the volume, and the drastic change in the volume of cola is in the process of freezing." Since the density of ice is O. 917g/cmsup3； , water is 1g/cmsup3; , so the volume expands by about 9% after freezing. Although Coke is not pure water, it is not too far from this number.

The freezing point of pure water at standard atmospheric pressure is o degrees Celsius. When various solutes are dissolved in the water, the freezing point is lowered. The freezing point of cola is about 3o degrees Fahrenheit (about -1. 1 degree Celsius). This is the coke after the can is opened, and the freezing point of the sealed can cola will be reduced due to the high internal air pressure. However, due to the change in pressure, the freezing point of the guide zhì did not decrease significantly.

There is also a change in carbon dioxide gas, which is dissolved in cola. Therefore, the internal pressure of an unopened can of Coke is higher than the atmospheric pressure. The internal pressure of the canned cola is 117 kPa at 4 degrees Celsius and 248 kPa at around 21 degrees Celsius. 24o kPa at 38 degrees Celsius. In comparison, the atmospheric pressure is 1o1 kPa. In other words, the pressure of refrigerated cola is slightly higher than atmospheric pressure, which is about 2-4 times the atmospheric pressure at room temperature.

Therefore, the solubility of carbon dioxide in water is the lower the temperature, the higher the solubility. Cooling will promote the dissolution of carbon dioxide and reduce the air pressure in the tank.

But after Coke starts to freeze, a lot of carbon dioxide is released. Because the gas does not dissolve in the ice. The carbon dioxide released from this greatly increases the pressure inside the tank. According to Boyle's law, the pressure of a gas is inversely proportional to its volume, at the same mass and temperature. Canned cola is 355mL with 3-3 dissolved in general. About 7 times the volume of carbon dioxide, which means that the volume of this carbon dioxide at standard atmospheric pressure is about 1L. When they are released in a closed jar, the volume of the gas is pressed very small, and the pressure will naturally be very large, since most of the volume in the jar has been filled with ice. How big it is is related to complex factors such as the deformation of the can and the freezing of the cola, and it is impossible to estimate.

These gases are compressed to 5% of the standard atmosphere, that is, 1L of gas is pressed to 5omL, and considering the volume of the tank and the icing inside, their pressure at this time is 2o standard atmospheres.

The Coke can is designed to withstand 1oopsI, which is 689. 5 kPa, close to 7 atmospheres. Under normal circumstances, the internal pressure of coke is usually only two or three atmospheres, so this strength is enough for normal use. But in the extreme case of freezing, a frozen canned Coke is no different from a bomb. ”

Speaking of this, Yang Luo took the last puff of his cigarette, and then threw the cigarette butt on the ground: "Look at the Coke can in Secretary Li's hand, it has been deformed, and the bottom is even more protruding, it can be seen that the pressure of this listening to Coke has passed 2o." So when Secretary Li touched a pull ring, the pull ring was ejected by a strong air pressure, and coincidentally, it happened to shoot into Secretary Li's throat. ”

The police inspector said: "In other words, Secretary Li died accidentally? ”

Yang Luo smiled slightly, and walked outside: "Whether it was an accident or not, you can only know if you investigate deeply, don't make a conclusion too early." ”