"Poisoned?"

Hearing Professor Wu's words, all of us were extremely surprised.

Although we had wondered why the surface of the victim Lin Lan's bones showed a layer of gray-black, there was nothing to be gained during the drug test, and the examination in this regard could only be stopped.

Because at the same time, a wound with a depth of 5cm and a large wound area was found on Lin Lan's skull, which caused the skull to be fragmented, so in the autopsy report, the fatal injury we wrote was a heavy blow to the head with a blunt object, which caused the skull to shatter, which in turn led to death.

This statement is reasonable and legitimate.

However, neither I, nor Professor Wu, nor Xia Xixi, did not give up the examination of the obvious slight sign of poisoning on the surface of the bones.

It's like hanging a stone in the middle of your heart, and if you don't cut the rope and let the stone fall, your heart will never be steady!

Now it seems that Professor Wu's research in the past few days has achieved remarkable results.

Seeing our performance, Professor Wu nodded: "That's right, it's poisoning." ”

After that, Professor Wu stopped talking nonsense, distributed the toxic composition test report to each of us, and then began to explain it to us.

"At the beginning, we all knew that Lin Lan had been poisoned, but because we found a fatal injury that made sense, we hurriedly submitted an autopsy report, but as I did a lot of poison testing experiments in the past two days, after comprehensive analysis, I detected cardiac glycosides (dai) from the corpse!"

"Cardiac glycosides?"

"What are cardiac glycosides?" Wang Jianfei looked at Professor Wu blankly, then at me again, and asked.

I extinguished the cigarette: "Cardiac glycosides, also known as cardiac glycosides, are a medical drug that is helpful to patients with heart failure, but cardiac glycosides are typical double-edged sword elements, if used on the good side, it can be used for medicine, but for the bad side, this is a typical toxin!" ”

"That's right." Professor Wu nodded: "What Xiao Chuan said is very right. ”

Tang Yu frowned: "Are there many sources and channels of cardiac glycosides?" ”

"Not much." Professor Wu shook his head: "It is precisely because of the two-sided nature of this drug that it is rarely used in the medical community now, and it has even been banned from being used in medicine, but it is ...... This toxin, if you know how to extract it, is actually very easy to obtain...... For those who understand, it's at your fingertips. ”

Everyone was stunned.

"Oleander?" I asked, staring at Professor Wu.

"That's right! It's oleander! ”

Professor Wu sighed: "Oleander is an evergreen erect shrub, up to 5 meters tall, commonly found in urban greening, if I remember correctly, we saw artificially planted oleanders on the way to S City!" If you want to extract cardiac glycosides from oleander, you don't have to wait for the flowering period, and all the rhizomes, leaves, flowers, etc., of this plant can extract this toxin, and there is no need for complicated equipment and operation methods......"

"In other words, before Zhou Haoran killed Lin Lan, he himself, or someone else, also planned to kill Lin Lan?"

"That's right!"

Professor Wu nodded: "But I think the idea that the person who poisoned Zhou Haoran is not very likely, because according to the investigation data, Zhou Haoran graduated from primary school and does not understand the principle and extraction method of oleander toxins, and secondly, since he violently killed Lin Lan, how can a murderer choose two ways to kill at the same time?" The more ways of killing, the greater the possibility of exposure, and the more hidden dangers, but anyone with a little brain will not do this, which is equivalent to cutting off the head and feet, isn't it taking off his pants and farting? ”

"If Zhou Haoran planned to poison at the beginning, he had 10,000 ways to stop doing it, and taking cardiac glycosides for a long time could make people's hearts and even various organs fail, and at the same time, if Zhou Haoran had done his homework in the direction of killing people every day, then why did he take the huge risk of being found and choose to throw his body in a barren mountain? People who can extract cardiac glycosides to kill people can actually easily get the ...... of potions that make human flesh decay quickly."

"In other words, there are still people who want to kill Lin Lan and plan to use cardiac glycosides, but when cardiac glycosides have not directly caused Lin Lan's death, Zhou Haoran took the lead in killing her?" Wang Jianfei analyzed.

"That's right!" Professor Wu nodded: "This idea is the most reasonable, and at the same time, the person who poisoned Lin Lan should be the one who sent Zhou Haoran a photo and wanted to stimulate Zhou Haoran to do it quickly!" This is a drama of borrowing a knife to kill people. ”

Tang Yu snapped his fingers: "Then our current investigation direction will start with the people that Lin Lan has been able to contact in the past two months, and at the same time, our thoughts are just ideas, we can't rule out the possibility of Zhou Haoran's poisoning, and continue to interrogate Zhou Haoran!" ”

"Yes!"

Wang Jianfei nodded, go straight to it!

Once again, the case is mired in mystery.

It stands to reason that Zhou Haoran has admitted that the murder was committed, the evidence of the crime is sufficient, the facts of the crime are clear, and we can close the case, and even according to the normal case-handling procedures, we have found all the key factors in the entire case, the victim, the murderer, and the murderer's motive for killing and the cause of the victim's death, everything should be over.

However, we are a red S-class special case investigation team.

It is precisely because of our unusual investigation team that no one plans to return to the DPRK if this matter is not clarified.

Wang Jianfei's interrogation of Zhou Haoran again was not smooth.

When Zhou Haoran heard that the indirect cause of death of his wife Lin Lan was not because of his violence, his originally depressed attitude of waiting for the verdict instantly turned 360 degrees!

And he strongly said that he didn't know anything about his wife's poisoning!

And strongly demand that the police must bring the murderer to justice!

Zhou Haoran's positive attitude is nothing more than two reasons, first, he wants to know who his wife offended will be poisoned, and second, if someone indirectly poisons and kills someone, he is not a murderer, and he can exonerate himself, and the latter is the most important reason.

I participated in the whole process of interrogation, and Professor Wu, a psychology expert, stayed outside the one-way glass and watched.

The final result of the interrogation was that Zhou Haoran refused to admit that he had poisoned.

According to my analysis and Professor Wu's analysis, Zhou Haoran was telling the truth, he really didn't know that Lin Lan had been poisoned before he did it.

Day 2.

We reconvened to discuss the merits of the case.

Return the case to the original point, and find out according to the clue of poisoning and poisoning.

Tang Yu said: "We can start from the direction of how Tang Yu was poisoned......

Professor Wu said: "The poisoning is already very deep, at least it takes cardiac glycosides for more than a month to cause gray-black ...... on the surface of the bones."

Xia Xixi said: "Then we can investigate, what did Lin Lan eat in the two months before she was killed?" Where did you eat? Who have you come into contact with......"

According to our comprehensive survey results:

Lin Lan's life before her death was regular and simple, and she worked as a nursery teacher in a nature kindergarten, and her life rhythm couldn't be more normal.

Tang Yu took out the information and said: "Lin Lan's breakfast is made at home, a typical oriental housewife, the ingredients for cooking are freshly bought in the vegetable market every morning, and there will be no problems, which has also been confirmed by Zhou Haoran......"

"Lunch was eaten with the children in the kindergarten, and the same as the children's food, we conducted some blood tests on the students of Nature Kindergarten, and no cardiac glycosides were found!"

"Zhou Haoran never eats dinner at home, Lin Lan still cooks at home, and the ingredients still come from the vegetable market."

Everyone frowned with dark faces: "That means that Lin Lan has no conditions to be poisoned at all......"

Once again, the case is struggling.

At this time, Wang Jianfei proposed: "This road is not working, then change the direction and find out who Lin Lan has come into contact with!" ”

Tang Yu shrugged: "This is simpler and clearer, at home, contact Zhou Haoran, to the school, contact with school leaders, teachers, colleagues and children, there must be no problem in the school, the rest, she doesn't contact anyone, oh yes, there is Zhang Toyota......"

"Could it be that Zhang Toyota was poisoned?" Wang Jianfei asked rhetorically,

Xia Xixi said: "Zhang Toyota didn't get Lin Lan, and what he couldn't get ruined ruined him, this is the perverted logic that the villain likes to use in TV series." ”

Professor Wu shook his head: "It exists, but it is not reasonable,"

"Then the second possibility!" Xia Xixi said: "It is also possible that Zhang Toyota felt that Lin Lan was not doing well, and was often beaten, and persuaded Lin Lan to divorce Zhou Haoran, but Lin Lan refused to divorce Zhou Haoran because she couldn't have children, whether it was guilt or so-called love...... Zhang Toyota's background information is a university degree, although she is now working in sales in a 4S store, but I have investigated, she majored in chemistry when she was in college, and he must have the ability to extract cardiac glycosides from oleander......"

Professor Wu shook his head again: "It exists, but it is still unreasonable, at least from the perspective of Zhang Fengfeng's performance towards Lin Lan when he was interrogated, this is unreasonable, otherwise he is an absolute drama spirit!" ”

We didn't have a clue about our analysis, Wang Jianfei said: "If it is written, it will be wonderful!" ”

I didn't speak.

At this time, Tang Yu made a decision on the direction of our next work and said: "No matter whether Zhang Fengtian will kill Lin Lan for some reason, he is currently the biggest suspect!" This line, you can't lose ......"

"I'm going to interrogate Zhang Toyota!" Wang Jianfei patted me on the shoulder: "Let's go, you come with me, if this kid is really a murderer, then his acting skills are definitely at the level of an actor!" ”

"Okay, I'll check it out too." After speaking, I lit a cigarette and smoked it, and followed Wang Jianfei to the interrogation room again......

……

"What?? Poison? What are you kidding! Xiaolan was poisoned? Do you still suspect that I killed her?! I absolutely didn't! How could I kill Xiaolan! If I could, I'd rather die in place of Xiaolan! I'm alive anyway...... It's also a sin......"

Zhang Toyota's attitude was very positive, and said: "I definitely didn't kill people, if Xiaolan was really poisoned, you should probably investigate the person who took the photo, the person who took the photo is the one who deliberately provoked the relationship between Lin Lan and Zhou Haoran with ulterior motives, I am the male protagonist in the photo, naturally it will not be my ......"

At this time, Professor Wu, who was outside the one-way glass, picked up the microphone, sneered, stared at Zhang Toyota, and asked, "Then, what if you hired someone and deliberately planned a big situation?" ”