"Plant alkaloids plus sedative drugs......"

Chen Yi's voice sounded, why he chose this combination, is a question worth thinking about.

There are still many poisons that can cause death in a short period of time, but the murderer used the method of delaying killing, and in order to succeed, he also added tranquilizers to let the victim die slowly in a coma.

It sounds like a little troublesome, and it's not meant to add to the victim's suffering.

Death in a coma is no different from euthanasia.

In this process, once the unconscious victim is discovered, there is still a high chance of escaping.

"Did you think of anything?" Fang Shuyu asked.

Chen Yi spoke: "Both victims have a chance to live, and it takes at least an hour from ingestion of toxin to death, but they are not very lucky and are not discovered." ”

"The murderer's use of plant alkali to delay the killing seems to me to be ...... He doesn't have the heart to kill, don't you think? ”

Fang Shuyu thought for a while and said, "I don't think so, you also saw the process of Li Yao's killing, the murderer moved Li Yao to a hidden alleyway after she lost consciousness, greatly reducing her chance of being discovered." ”

"There is also this person, the place where he is unconscious is extremely dark and there is no light, even if there are many guests who go there to go to the toilet, it is difficult to find that there is a person lying on the ground with their eyes and drunk."

"So, it seems that he was given a chance to live, but in fact the chance is slim, and the result says everything, both of them are dead."

Chen Yi didn't refute, nodded and said, "What you said makes sense, the result is indeed the most important, both of them are dead." ”

"You go back and rest first, and then continue to check the source of the plant alkaloid."

Fang Shuyu: "Okay." ”

Chen Yi didn't leave, he was waiting for Zhuo Yun.

When Zhuo Yun also returned to the city bureau, he reported the results of the search around the crime scene, and did not find anything like syringes.

It seems that the killer did not throw it away, or handled it more secretly.

It was 11 a.m., and the investigation was proceeding at a normal pace.

The surrounding surveillance did not capture suspicious people, mainly because the location was too remote and the monitoring was lacking, not to mention that it was easy to dodge, even if you didn't deliberately avoid the probe, the chance of being photographed was not high.

By comparing fingerprints in the database, the identity of the deceased has been determined.

Zhang Su, 32 years old, an unmarried foreigner who lives alone, is a computer software engineer by profession, commonly known as a programmer and a coder.

"Out-of-town, unmarried, living alone."

Chen Yi has the common denominator in his mind, and it is still unknown whether it is useful.

"Brother Yun, investigate Zhang Su's interpersonal relationship, check carefully, focus on finding the intersection between him and Li Yao, and determine whether the two of them know each other, even if they have just met." Chen Yi gave the order.

Zhuo Yun: "Okay, I'll take someone right away." ”

After Zhuo Yun left, Chen Yi came to the whiteboard, picked up a marker pen and wrote Zhang Su's name, and connected it to Li Yao, and fixed the photo.

When Xin came over: "Chen Yi, I checked the pendant, there are many of the same style on the Internet, and if you want to get a breakthrough from the source of the pendant, the hope is not very big." ”

Chen Yi nodded slightly, and didn't say anything, since the whole people shopped online, the source of goods has become more and more difficult to check, and the development of science and technology has both advantages and disadvantages, and it has also brought great convenience to criminals.

When Xin and Chen Yi stood side by side, looking at the victims on the whiteboard and the condensed clue information, it was very clear.

"Since it was done by the same person, then Li Yao and Zhang Su must know each other, but they don't know why they were killed."

When to give their own analysis.

"They are all outsiders, they are all unmarried and live alone, Captain Lu has already checked Li Yao's interpersonal relationships, and there is no Zhang Su among them, so the two may have met because of their interests and hobbies, a small circle."

"What do you say?"

Chen Yi agreed: "There is this possibility, there is a contradiction in a special small circle, which triggers the murderer's murderous intention, but killing people requires a very good reason and courage...... That's right, tranquilizers. ”

"Lao He, you said that if the tranquilizer drug was used by the murderer himself, can it be reasonably explained?"

Shi Xindao: "I'm also thinking about this problem, the state stipulates that sedative drug pharmacies are not allowed to sell privately, if necessary, you must go to the hospital to prescribe, under normal circumstances, the person who can have sedative drugs is either a doctor or a patient." ”

"But all people who take tranquilizers usually have symptoms of anxiety, depression, mania and even schizophrenia.

"A small thing for ordinary people may be a big thing for them, and it is very likely that they will kill because of a word."

Chen Yi nodded: "Well, at present, in my criminal profile, I also tend to have certain mental or psychological problems with the murderer. ”

"Without further ado, Lao He, check the hospitals in the city, one meter seven or eight tall, male, the speed must be fast, work hard for two days and work overtime."

"So far, we don't know the connection between Li Yao and Zhang Su, in case the murderer is a madman to take revenge on society, then we will be in big trouble, and we must find him as soon as possible."

When new: "Okay. ”

The unknown is the most terrifying, and before the relationship between Li Yao and Zhang Su is found, no one dares to swear that the murderer will kill a few people.

The time came in the evening, and the investigation continued.

In the office, Chen Yi sat in front of the computer, holding a bag of evidence with a pendant in his hand.

This is a light blue pendant that existed at the scene of both murders, in the shape of a teardrop, and the technical department is basically determined to be brand new, without any traces of human wear.

Why the murderer left this thing, I don't understand.

During the day, Chen Yi did not tell everyone that with his experience in investigating cases in two lifetimes, it is necessary to suspect the possibility of serial murder with such a number of crimes left behind at the scene, and this represents that the blue pendant must have a unique meaning.

"Poison, tears."

Chen Yi clicked on the keyboard to search for keywords, and found that it was all irrelevant information such as "whether tears are poisonous" and "why do people cry".

He changes the keyword.

Phytoalkali, tears.

Still no gains.

He continued to change and eventually found something called tear grass, but it was only an insect-feeding plant, and it was not lethal and toxic, even if it reacted with tranquilizers.

"Either it has something to do with the modus operandi or the motive for the crime...... Or both? ”

Chen Yi touched his chin, if it was related to the motive of the crime, it was useless to think about it, and he could only rely on investigation or direct interrogation of the suspect to get the answer.

"Make sure."

Chen Yi took out his mobile phone to find the group where the rich second-generation friends gathered and sent a message.

[Does anyone know a botanist?] 】

Re: I don't know, what's the situation?

Re: Don't know, next.

Re: I'm a botanist, ask me.

This sentence attracted a lot of joking ridicule.

Chen Yi looked at it for a while, and was about to put down his phone.

[I know one]

A friend replied.

Chen Yi: Is it reliable?

Partner: Reliable, an old professor, a friend of my grandfather.

Chen Yi: Help call and ask, tears, plants, and poisonous three keywords, is there a corresponding plant, I will invite you to eat another day.

Other: No problem, wait a minute.

The group is lively, Chen Yi rarely shows up in the group, as long as he appears, there will be demand, which is worth complaining about.

Since the other party became a criminal police officer and sat in the captain's seat, he almost didn't get together with them, which is a pity.

But the friendship is still there, and everyone is still friends.

After a long time, there was a reply in the group: Chen Yi, I asked, Lily of the Valley.

Chen Yi: Thank you, get back in touch, if you have time, let's be together.

Everyone: It's decided!

Chen Yi put down his phone and ignored the new messages behind, and tapped on the keyboard to start searching for Lily of the Valley.

Detailed information is out.

Lily of the valley, a herbaceous plant of the lily family Lily of the valley, with dwarf plants, up to ......

Chen Yi slid the mouse to read the entire popular science, but found nothing related to tears.

"The keyword is wrong."

Chen Yi realized this possibility and deleted the lily of the valley and replaced it with lily of the valley.

After clicking on multiple web pages, Chen Yi's gaze froze, and he immediately picked up a pen and paper and began to record.

He found what he was looking for, and it was very accurate and detailed.

Lily of the valley, the scientific name of Lily of the Valley, also known as Lily of May, Tears of the Virgin, Stairway to Heaven, Gentleman's Lily, etc.

The whole plant is highly toxic, and the leaves are particularly toxic.

Form: Known for its small white bell-shaped flowers, the fleshy fruit is orange-red in color, and if the flowers and leaves are stored in water, the water will become highly poisonous.

Symptoms of poisoning: flushing, irritability, headache, hallucinations, skin rashes, dilated pupils, vomiting, stomach pain, nausea, excess salivation, and in severe cases, falling into a coma, heart failure and death.

Time of poisoning: Immediate.

Detoxification and treatment: Quinine is used after gastric lavage to suppress the heartbeat rate.

Distribution: The lighthouse country is the most common, native to England.

After recording the main information, Chen Yi picked up his notebook and glanced at it.

Excessive saliva production, skin rashes, heart failure, these are the autopsy results given by the forensic doctor, which can be matched.

"Tears of the Virgin?"

"It seems that he is a madman with a sense of ritual, there is no news from Zhuo Yun's side, and the possibility that Li Yao and Zhang Su have no intersection is getting bigger and bigger."

"Just in case, this person must be found as soon as possible, and I hope that Lao He can have a result."

After thinking about it, Chen Yi opened the map and began to mark the addresses of the two cases, and the radiation range of the intersection had exceeded ten kilometers.

Now that everyone is driving, psychological safety zones are no longer particularly practical unless there are a lot of victims.

He picked up his mobile phone and dialed Fang Shuyu's number.

"Shuyu, find a way to make a lily of the valley and determine if the plant alkaloids in the deceased's body come from this thing."

"Oh, I asked a friend, I shouldn't be wrong."

"Well, that's it for now."

Hanging up the phone, Chen Yi leaned back in his chair, and the scene of Li Yao jumping off the building a few days ago came to his mind.

has already died the second one, so the result of Lu Guangjun's visit to Li Yao's hometown is probably not optimistic, and there is a great possibility of returning in vain.

Before Zhang Su died, how should this case be investigated?

Every case is a valuable experience, Chen Yi needs to think about this issue, and the Li Yao case and Zhang Su's case are similar.

There was nothing wrong with Lü Guangjun's investigation process, and if there was no progress, he had to change directions.

"Syringes, tranquilizers, rare lilies of the valley, one meter seven or eight tall, and monitoring from a distance."

The direction cannot be said to be none, but it is basically a needle in a haystack.

From the perspective of the motive of the crime, if the murderer himself used tranquilizers, then he may suffer from depression, anxiety, irritability, etc.

Assuming that it is a depressed mood, the suicide rate of depressed patients is very high, and Li Yao had committed suicide a few days ago.

It seems reasonable to ask, is the murderer also a group with suicidal tendencies? Did he kill himself?

Let's assume that the murderer and Li Yao really don't know each other, so the reason why he killed Li Yao was to help her complete suicide?

It's a very strange logic, but there is never a shortage of strange people in the world, and the behavior is simply incomprehensible, Chen Yi has seen too much.

After many assumptions, Chen Yi had a sense of urgency, and the case needed to be solved in the shortest possible time.

(End of chapter)