Yan Zhi shrugged her shoulders and made a gesture of affirmation, "Master Su, I completely agree." ”

"I'm just speculating. Su Huan looked at Yan Zhi with a serious expression, "Shouldn't you also tell who the murderer is?"

Yan Zhi couldn't resist Su Huan, stretched her waist, sighed and said, "Master Su can listen to it if you want to, after all, no matter what the answer is, you have to be satisfied first.....

"But aren't you hungry? Look at the day, it's past noon, I'm hungry...... When I am hungry, my brain is starved, my mind is rigid, and my tongue is knotted......"

"Okay, what do you want to eat?" Su Huan was good-tempered at this time, looking at Yan Zhi, he actually showed a little smile.

"Mutton steamed buns!" Yan Zhi immediately came to her senses as soon as she heard that she was going to eat.

"Yo, don't you have a taste for yourself today?"

"What do you know?" Yan Zhi glanced at Wei Huan with disdain, "There are many Hu people in the north of the city, and this kind of food is authentic." Besides, don't you want to listen to puzzles?"

"What's wrong?

"Do you know that the key to the murder in the prison is in this bowl of mutton steamed buns......"

Yan Zhi said and walked out, and when she walked to the door, she picked up Pei Nanxing, who was confused, and went out with a small tune.

Wei Huan was left petrified in place.

--------------------------------------

"Hey, are you enough?"

After Yan Zhi had swept away two bowls of mutton steamed buns, Pei Nanxing also asked for a white-cut mutton with great interest, Wei Huan looked at the two women who could eat, and made up his mind, when it came to paying, he still did the same as usual, just pretend to be dead.

Among the remaining three people, it was Su Huan, the man, who ate the least. This handsome boy is not a shelf, he is a character like him, who is noble from head to toe, and sits in a small shop on the street, which is really eye-catching, probably because passers-by have no appetite.

"I'm not trying to start somewhere......"

Yan Zhi swallowed the last piece of mutton, and used chopsticks to pull the soup bowl that was gone.

"This case is very special, especially in that there is very little physical evidence, and the obvious physical evidence has no effect, and even deliberately leads me astray, while the real physical evidence, which I didn't remember until this morning, when I tasted that damn powder again. ”

"Let's start with the first piece of physical evidence, the piece of sole cloth found by Master Su in the well. The shoes that were carefully replaced and burned show the cautious character of the murderer. ”

"Yes, every detail of this case, from the choice of the method of murder, to the knowledge of the scene, to the control of the victim, every place, every detail is shouting to me: there is a well-planned brain behind it.

"If you've seen how shallow, impulsive, chaotic, and disorderly the cases I and Wei Huan handled before, I really want to award this murderer with the Best Execution Award for the Project of the Year. ”

However, when he finished killing people and left the prison, he made such an obvious mistake - he did not light the oil lamp again. For the first time, there was a discrepancy between the physical evidence at the scene and my profile of the murderer, and I felt that something was wrong, but I couldn't say it. ”

"The second piece of physical evidence, the footprints in the mud at the bottom of the well, is much more enlightening. ”

The plaster mold of the footprints was sent to the warehouse by Wei Huan, and there is nothing special about it.

"I don't see any difference. Besides, you said that the murderer this time is as fine as a monkey, and it's not easy to fake this thing with footprints?"

Yan Zhi nodded,

"That's right, it's not difficult to change the stride length and size of the footprints, and it's very simple to cause us to misjudge the size and height of the murderer. But actually, what really caught my attention was the depth of those footprints, which is why I hired an artist to let you take the plaster. ”

"If you look closely, the footprints on the left foot are shallower than those on the right foot, and the outside of the right foot is particularly noticeable, especially in the thick mud at the bottom of the well. I really can't think of any need for the murderer to falsify such a detail. ”

"What's the point of faking the depth of the footprints?"

"The answer is – there is no point in faking. At this point, the footprints truly reflect the characteristics of the murderer. The murderer himself did not realize that the defect that his legs and feet were not very dexterous would clearly show the footprints printed in the mud.

"It is precisely this characteristic, coupled with our analysis of the modus operandi of poisoning in Qixuan Temple, that the murderer chose to use poison because he did not have the conditions for a head-on confrontation. Of course, it is also due to the fact that so many opponents must be dealt with in a very short time, and the poison has unparalleled efficiency. ”

"The person who killed Boss Jing in the shop last night doesn't seem to fit this description. ”

Su Huan should have thought of something, and frowned.

"That person is obviously tall and has dexterous legs and feet, and it is very likely that he is a practitioner, and he is really not cautious. On the contrary, he was bold, surprisingly bold. ”

"At the time of the crime, it was not completely dark, and the scene of the crime was facing the street, and there were still pedestrians on the road, and they didn't even know the time when they were patrolling the streets every day, so they were found in the middle of the crime.

"And this kind of thing happened to the murderer who planned the big prison case, it's unimaginable. ”

"At this point, the nature of the case has changed, and whether the change from an individual to a collaborative crime also means that the motive of the case is not just about the interests of a single person, of course, this is only my speculation. ”

"Going back to the identities of these two murderers, I tend to infer that the murderer in the case in the prison killed Sun Yi, and we can call him Murderer A for the time being, and this bold daredevil, the murderer B, came to the Jing family pharmacy at the same time to help him dispose of this Jing boss, who only knew the source of the poison.

"Having said that, the use of rare poisons certainly increases the difficulty of the autopsy. But relatively speaking, once the variety of poison is determined, the source of the poison is also easy to investigate. ”

"By the way, Sister Yan is talking about the white medicine powder that Aunt Yang has there, what the hell is that?"

"I was about to talk about this, your dad would be interested. Mrs. Li said that 'Wupu' can be painful, but it can't be used much, and the principle behind it has something in common with the ricin that your father is fiddling with. ”

"Huh?"

"The nail chain of ricin can easily pass through the normally closed cell wall, and morphine, the representative of opioids, which is one of the active ingredients in 'Wupu', can easily achieve the same effect. ”

"It's just that morphine acts on opioid receptors on cells to cross the barrier. You can understand that this drug bribed the jailer guarding the door of the cell in order to get into the cell......"

Yan Zhi took out the small bottle and put it on the table, the brownish-yellow powder emitted a strange light in the bottle, Wei Huan just wanted to take it over and take a closer look.

"Don't look at this bottle of morphine powder, it's not much more salt than stir-frying a dish, if it's pure enough, there may be more than enough to poison all four of us......"

"You didn't talk earlier!" When Wei Huan heard this, he hurriedly retracted his outstretched hand, "It's better for you to take it." ”

"But how do you know that?"

Su Huan has known Yan Zhi for a short time, Wei Huan will not ask this kind of question, and she is too lazy to think about it, Yan Zhi, she just knows some strange things that everyone doesn't know, and she is still chattering and proud.

"It's in the book. Yan Zhi spoke casually.

"Can the title of the book be taught, but it's quite interesting......"

"Basic Pharmacological Research"? When I was in school, I watched and played in the library, but I don't remember the name. But I don't think it's very well written, Master Su, you can't find it, so don't bother about it. ”

However, the nature and characteristics of this type of drug are well documented in the book. While morphine stimulates opioid receptors, it participates in the release of dopamine - this is a very miraculous substance, which exists in the human brain, which will speed up the communication efficiency of neurons, and at the same time secrete this substance, we will feel pain reduction, relaxation and pleasure on a macro level, which is the principle of morphine's analgesic effect. ”

"It's amazing, isn't it? It turns out that the logic of creation is to command the brain to secrete dopamine only when humans are engaged in behaviors that are conducive to survival and the continuation of the race, such as eating, such as ...... When Wei Huan, which girl do you fall in love with......

"Does this have anything to do with me?"

"It's okay...... I'm just using an analogy. ”

Yan Zhi licked her lips, smiled pleadingly, and then said:

However, this drug deceives the rules of creation, and the dopamine secreted in this case no longer requires human beings to work hard, live seriously, pursue and struggle hard, and only need to take or inject some compound drugs. ”

Later, the diacetyl compound of morphine - of course, this is the name in the laboratory, outside the laboratory, it has almost become synonymous with drugs, this preparation was invented by Bayer, mixed with various additives, and was legally sold for 30 years, which is not an exaggeration to describe it as infinitely toxic. Even now, with more and more effective withdrawal drugs being invented for opioid addiction, complete psychological withdrawal is still extremely difficult. ”

"What the hell are you talking about?"

Wei Huan really couldn't stand it, "Anyway, this thing can relieve pain, but it's addictive." ”

"Yes,"

Yan Zhi nodded quite seriously.

"I would say that technological progress cannot contradict the principles of creation...... If you do it reluctantly, you will be punished......"