A few hours later, the laboratory finally completed all the biological samples of this case.

At the same time, the nature of the case was also finalized.

"Poisoning?!"

In the office of the laboratory department, Lu Ke took the test report that was still a little warm, and let out a cry of surprise.

Wen Qiaoqiao, a technician from the laboratory department on the side, nodded and said seriously: "The histopathological examination of the deceased's heart found no abnormalities, and the routine toxicity test did not find anything, but we found some drug residues in the blood samples of the deceased. ”

Although Lu Ke never thought that this case was a simple heart attack, and poisoning was also in his consideration, he was still a little surprised that the routine poison test did not detect anything.

As she spoke, Wen Qiaoqiao took out another blood test report from the drawer and handed it to Lu Ke: "The drug residue is very small, so I used two blood samples to do two blood tests, and after comparing the results, it can be determined that the deceased took some drugs before his death." ”

The presence of drug residues in the body of the deceased is a major discovery in itself, but it is also a very important issue.

These drug residues are not directly related to the death of the deceased.

Lu Ke quickly glanced at the test report and asked in a deep voice, "Can you find out what kind of drug it is?" ”

Wen Qiaoqiao replied: "I focused on analyzing the composition of the residual drug, but there was no result, and there is no drug with the same composition on the market, so if you want to further analyze, you need technical support from the provincial department." ”

Lu Ke looked at Wen Qiaoqiao and continued to confirm to her: "In other words, this is a new drug that has not yet appeared on the market?" Is this drug lethal? ”

Wen Qiaoqiao nodded: "For now, these drug ingredients will paralyze the heart in a short period of time. ”

"Paralysizing the heart......" Lu Ke frowned suddenly, and muttered: "It seems that this drug is very likely to be the cause of a heart attack......

Then, Wen Qiaoqiao added: "The metabolism rate of this drug is very fast, if the dosage is controlled, even a blood test will not be able to detect it." I think you should pay attention to this point, maybe it will help you solve the case. ”

Now, with the results of a blood test, it is certain that the deceased had taken a drug that could cause heart paralysis before his death.

However, based on these alone, it is still not certain that this case is homicide, and judging from the last words of the deceased, the possibility of suicide is also very high.

It didn't take long for Mo Yufei to come back with a field investigation team.

This was the first time she went out to investigate alone with a field investigation team, and judging from the results, it was very smooth and successful.

In the office of the criminal investigation detachment, everyone held a case analysis meeting based on this case.

Mo Yufei stood in front and was reporting the results of his investigation:

"I have retrieved the entrance and exit surveillance of the deceased's residential area, and the surveillance video has been sent to the Technical Investigation Department for investigation. In addition, according to the description of the security guard at the entrance of the community, at about eight o'clock in the morning, there was indeed a man with glasses and a flat head who entered the community. Because the man greeted the security guard politely when he entered the community, the security guard was particularly impressed. Judging from the description of the security guard's appearance, it is indeed consistent with the description of the cleaner Sister Liu. ”

Su Simeng was a little excited, and subconsciously said: "This person's appearance is very similar to Ren Jianyun, it should be him." ”

After he finished speaking, he realized that he had interrupted Mo Yufei's investigation report a little impolitely, and then made an apologetic gesture to her, and then motioned for her to continue.

Mo Yufei didn't care, and continued: "And according to the visit of Sun Jinyu's neighbors, the neighbors did hear a quarrel in Sun Jinyu's home this morning.

But because of the soundproofing of the building, the neighbors couldn't hear what they were arguing about, but it was certain that there was an argument.

Neighbors said that Sun Jinyu is usually very gentle and elegant, and he is angry with books, and he has never seen him angry. He was also very curious about who Sun Jinyu was arguing with and because of what he was quarreling with.

By the way, the neighbor also said that Sun Jinyu has always lived alone, has a more introverted personality, and rarely comes to the house. But on several occasions, he saw a man who had been to Sun Jinyu's house.

Especially once Sun Jinyu kept sending the man downstairs, and happened to catch up with the neighbor to go home, the two chatted downstairs, Sun Jinyu said that the man was a colleague of his company. ”

After hearing this, Lu Ke lightly tapped his fingers on the table and concluded: "There are two things that we can be sure of at the moment.

First, Ren Jianyun, the direct boss of the deceased Sun Jinyu's company, often came to Sun Jinyu's home, and had quarrels with Sun Jinyu because of the company's affairs.

Second, there was a drug in the body of the deceased that had never appeared on the market, and the drug ingredient could cause heart palsy in a short period of time.

Combined with the fact that the deceased's workplace was a pharmaceutical company, it is very likely that this new drug was circulated by a pharmaceutical company. However, it is not yet possible to get an accurate conclusion whether it was suicide or homicide. ”

At this time, Ling Zizhen opened the folder in front of him, took out a pile of trace inspection reports, and reported seriously: "The technical team collected more than 50 fingerprints in the living room at the scene of the crime, and after comparison, eight of them were Sun Jinyu's, and the rest of the fingerprints were all from the same person, and it was very likely that they were left by Ren Jianyun." ”

Lu Ke pondered for a while, then cast his gaze at Ling Zizhen and asked, "Are there any other people's fingerprints?" ”

Ling Zizhen shook his head and replied very crisply: "No." ”

Lu Ke felt a little incredible, and asked him again: "Isn't there any fingerprints for the cleaner?" ”

Ling Zizhen replied decisively: "No." ”

This made Lu Ke feel even more strange, and asked again: "Is it suspected that Ren Jianyun's fingerprints have only appeared in the living room?" ”

Ling Zizhen sighed softly and replied, "Yes, all the fingerprints are concentrated in the living room, and there are only Sun Jinyu's fingerprints in other places. ”

Lu Ke nodded and didn't speak again.

Mo Yufei looked at Lu Ke's expression and asked with some curiosity: "Team Lu, do you think there is a problem?" ”

Su Simeng answered: "Anyway, the investigation of Ren Jianyun must be carried out, especially to determine fingerprints. If it was really him who killed him, then this Ren Jianyun is also the biggest suspect, after all, the poisoned drug is most likely from this pharmaceutical company. What's more, Ren Jianyun is the head of the scientific research team, and it is not difficult to get some illegal drugs with the convenience of his position. ”

On the side, Lu Ke looked at the fingerprint test report, frowning and reading it repeatedly.

He was silent for a while, and then suddenly said, "Don't you think the scene is too clean?" ”