"What punishment?"

Wei Huan squinted at Pei Nanxing, this little girl likes to ask these useless questions.

"The opioid receptors on the cells are used to external stimuli and increase their numbers dramatically. When the body adapts to the presence of morphine, once it is stopped, the cells will find that a large number of opioid receptors have no source of stimulation, which will also lead to a series of withdrawal reactions, such as anxiety, diarrhea, bone pain, depressed mood, ......"

"It's quite a toss-up, but it's not very deadly, but it's extremely difficult to quit. These things fell on Master Li, but they saved his life. ”

"What's going on over there, Lord Li?" Wei Huan was still interested in these practical things.

"Do you remember the cause of Lao Chen's autopsy?"

"Suffocation?"

Wei Huan almost forgot about it.

"Yes,"

Yan Zhi nodded and said:

"One of the most serious side effects of these drugs is that it reduces the control of respiratory rate by the respiratory centers of the brain. “

"Because under normal circumstances, opioid receptors are sensitive to the amount of carbon dioxide in the body, that is, they monitor the pH of the blood and can maintain the spontaneous breathing rate, and the intervention of morphine interferes with the normal work of the receptors......"

"Alas, you don't understand this too much, it's just that if you take too much medicine at one time, your brain won't remember that you still have a task that has to pant all the time. Therefore, within half an hour of overingestion, the injection will be faster, which will produce symptoms such as fainting, pupil pinpoint constriction, decreased respiratory rate, and finally respiratory failure, leading to death. ”

But in the case of Master Lee, he had taken such drugs for pain relief due to severe toothache. There are many more opioid receptors on the cell than the average person. He could tolerate ten to twenty times more morphine than the lethal dose, and he was like a nobody. ”

"So he's just lucky?"

"Pretty much...... Probably this thing is ridiculously expensive, and it's not very easy to get, so the murderer didn't weigh a pound and poured it into his mouth, so Lord Li survived in such a daze. ”

"If the murderer doesn't engage in so many flowers, just change a kind of poison, even if he takes some arsenic, Lord Li will be directly reimbursed for his life. However, at the time of the autopsy, the arsenic trioxide residue on the corpse reacted with the silver, which I suspect may be why the killer gave up the simpler poison. ”

"So, knowing the poison, the next question is how did the murderer poison it? This question, to be honest, has bothered me for a long time, even longer than the question of who the murderer is......"

"It doesn't matter what poison it is, morphine, arsenic. There are only three ways for the human body to ingest: skin contact, subcutaneous injection, and poisoning. ”

"Skin-to-skin contact is generally only suitable for some special poisons, and those things are good for slaughtering cities. Usually it's useless, but fortunately, Daqi doesn't have this kind of ghost talent......"

"Since the autopsy found traces of pinholes, I have been thinking about injecting poison, but this method will inevitably create a new problem......

"What's the problem?"

"Every cell in the prison had a lock, and the murderer had to unlock the door of each cell and inject poison into the twenty-two men without alarming everyone. “

"As long as one prisoner is not asleep and screams, the murderer will inevitably be unable to escape, even if he can get a hypodermic syringe, will he be so lucky, or will he be so cautious that he will do such a life-threatening thing?"

"But that bamboo pipe, wouldn't it be nice to use the incense to make everyone fall asleep?"

"Theoretically yes, but the killer made a fatal mistake here – that blowpipe was new...... I looked closely, and there were no signs of use inside. ”

"Besides, the area of the prison is too large, and the ventilation is not good, what kind of incense can spread to this extent, Xiao Nanxing, you are an expert in drugs, don't you say?"

"Well, this ...... I haven't come up with anything like this yet....."

Yan Zhi nodded with satisfaction.

"At this point, there was a second piece of physical evidence that contradicted the facts at the prison site, and I intuitively felt that I must have overlooked something, but I really couldn't remember it, so I was taken by Master Su to visit the kiln......"

"Ahem...... Su Huan lowered his head and coughed, "This part can be skipped ......"

"There's nothing to skip. ”

Yan Zhi raised her eyebrows and spread her hands, "If you really want to say it, that old man Zhang Anzhi is quite interesting......"

“......”

Wei Huan had pricked up his ears and was about to collect some gossip, he should have known that Yan Zhi would not give himself a chance.

"It wasn't until I was at Mr. Li's house that I realized that the key physical evidence had already appeared, but it was I who didn't understand it all the time, which would cause it to lose its value. ”

"Can you stop selling it and just say what it is?"

"Didn't you just eat two bowls of this thing?"

"You mean, mutton steamed buns...... Oh, by the way, Master Li said that it was also the food given to the prisoners in the prison of the Criminal Department on the night of the accident, but so what?"

"It dawned on me that since the first two options didn't make sense, the only and easiest way to poison them was why it couldn't be directly in the prisoner's food?"

"So how do you explain those pinprick marks?"

"Do you remember where the pinhole was?"

"It's either on the chest, or on the back......" Wei Huan vaguely remembered what Lao Chen had said

"Yes, each corpse has only one pinhole, none of them are on the limbs, and there are no traces of friction, which means ......"

"There is no sign of resistance. Wei Huan blurted out.

"Yes, the absence of a defensive wound probably means that the deceased was in a state of slow breathing or simply stopped breathing before being pierced. The wound of the pinhole is too small, and there is no difference between the wound before and after death. ”

"Moreover, I asked Master Li, he was also stabbed by the murderer, but he is still fine, obviously not harmed by any other toxins. So I started asking myself, does the so-called second poison really exist?"

"If the needle used by the murderer is not poisonous, can it also cause the same effect? What if he painstakingly made all the traces, including the use of secret passages, the oil left behind by lamps, and the placement of hollow bamboo pipes, all of which were carefully designed to give the impression that the murderer was carrying a weapon to enter from the outside, so as to conceal the real method of poisoning?"

"At this point, the second method I hypothesized has been formed, after the end of the day, Master Xie left the prison, and the jailer began to serve food to the prisoners, and he never went to the prison again.

"And the murderer has already moved his hands and feet in the food, counting the time when eating and morphine take effect, the time of death of everyone should be infinitely close to the time period of death given by the pretend, the beginning time from the time of the child to the middle of the time. ”

"And I, misled by Master Li's testimony, always thought that the murder happened around the time of the ugly time. As everyone knows, at that time, in the entire cell, when Master Li was asleep, he was probably the only one panting. ”

"And my misjudgment of the method of poisoning led me to make the second mistake, poisoning is completely different from stabbing in the face with a poisonous needle, the murderer does not need to be present to watch the prisoner eat all the poison, so there is no point in asking about the alibi of the time period of death. ”

"What I need to look for is who had the opportunity to poison before the meal was served, or who did not have an alibi after the ugly time until the body was found, because in the meantime he had to go through the tunnels and go back to the prison to set up the scene. ”

"So far, so good, except for a little ......"

"What is it?"

"I tasted it this morning, if you try it, you'll know. Yan Zhi said that she was about to hand over the bottle.

"Don't don't, the Wei family hasn't married a daughter-in-law yet, don't make a fool of yourself!" Wei Huan's scalp was numb when he thought about this thing, and he only learned Yan Zhi when he was crazy, and put it in his mouth.

"Don't be so nervous, Xiao Nanxing is here, are you afraid that I won't be able to save you back?" Besides, the microscopic morphine has an outstanding anesthetic and analgesic effect in medical treatment, doesn't it make Master Li suffer a lot less......

"Forget it, you better just say it!" Wei Huan shook his head desperately.

Yan Zhi is not afraid of death, and she doesn't know where she came from, she doesn't look like a girl at all.

But Pei Nanxing stretched out his hand curiously, Wei Huan couldn't help but become angry when he saw it, and hit the little hand with a "snap", "You are crazy with her too, don't die!"

"Oh. Xiao Nanxing blinked, his eyelashes drooped, and he didn't dare to speak.

Fortunately, there was still someone left on the table, so Su Huan took the opportunity to hold Yan Zhi's hand and took the medicine bottle away from her.

"Just a small bottle, keep it as evidence. ”

"Okay. Yan Zhi stuck out her tongue and made a grimace, Su Huan was able to make her honest for a while, it was really not simple, just listen to her continue:

"It tastes sour and bitter, and although it's not too unpalatable, it's not unpleasant for everyone. Although the food in our criminal department is good, the taste of cooking is not very heavy, and not any day's food can completely cover up the taste of morphine. ”

"These guys are all officials and have picky tastes...... If one is not satisfied, the murderer's plan hangs in the air...... And the large amount of spices added to the soup of the mutton steamed bun that night just perfectly neutralized this bitter taste. ”

"Why do these people do bad things, but their luck can be so good, it's so unreasonable......"

Pei Nanxing pursed his lips and was indignant on the side.

"Fortune is mostly created by oneself, little Nanxing. Yan Zhi smiled, "I didn't see that you are so young and have such a strong sense of justice......"

"But...... But shouldn't bad people be caught doing bad things?"

"Hmm...... You're right. ”

Yan Zhi looked thoughtful, "However, after you become a fast arrester and know what the crime is about, how tortuous judicial law enforcement is, and how difficult it is to implement justice...... Don't forget what you said today!"

"Don't talk about these disappointments," Yan Zhi waved her hand and turned to Wei Huan, "It's all prompted, you know who the murderer is, right?"