Since the investigation, the nature of the case has changed again, Sun Jinyu died suddenly at this point in time on the second anniversary of his wife's death, and the work of his wife's sister in the pharmaceutical factory has made this case appear infinite possibilities again.

At this critical moment, Lu Ke suddenly discovered that there was something strange about the flow of funds of Dujing Pharmaceutical Company.

In the past three years, Dujing Pharmaceutical's largest external expenditure has been on guinea mice and laboratory monkeys for drug experiments.

"Dujing Pharmaceutical Company is currently developing a special drug for the treatment of dementia, and at this stage, it has been developed for nearly three years, but the company has only purchased five experimental monkeys, and the unit price of each experimental monkey is 160,000 yuan."

Lu Ke looked at it and suddenly frowned.

"Experimental monkeys? Five experimental monkeys...... Is it more or less? Su Simeng was a little dazed for a while, and he didn't know the standard.

Mo Yufei has just been to a pharmaceutical company and has a better understanding of these things, explaining: "At least 40 to 60 experimental monkeys are used in the clinical trial stage of a new drug before it is launched, so the number of five can only be said to be particularly small. ”

Lu Ke also spoke slowly, and said seriously: "If the lethal drug comes from Dujing Pharmaceutical Company, then whether it is suicide or homicide, the person who uses it must know that this drug is lethal." Then it means that this drug has reached the stage of using experimental monkey trials, and the next step is the clinical trial stage. ”

Lu Ke raised his head, looked at the two of them, and continued: "In this way, the number of experimental monkeys is simply pitiful. It is important to know that this is not the first time that this pharmaceutical company has developed a drug, the previous development of drugs for the treatment of blood clots has been very successful, and they have successful experience, it is impossible not to know the importance of experimental monkeys in the development of a drug. ”

"Maybe it's the price and supply and demand of the lab monkeys that they can't buy more?" Su Simeng continued to ask.

Mo Yufei shook his head and said seriously: "No, judging from the current process of drug development, it takes at least twenty experimental monkeys to reach the conclusion, so where did the fifteen experimental monkeys in the middle come from?" ”

In the office of the criminal police team, Lu Ke was silent, and a terrible thought had already appeared in his mind.

He pondered for a moment and said seriously: "Let's continue the investigation according to the previous deployment, investigate the nursing home and the sister of Sun Jinyu's deceased wife." ”

Sun Jinyu's deceased wife's sister is Zheng Yuxuan, 26 years old, who worked in a pharmaceutical factory in Jing'an City after graduating from university.

Judging from Sun Jinyu's social relations, Zheng Yuxuan is a person who is relatively close to Sun Jinyu.

After getting in touch with Zheng Yuxuan, Lu Ke and Mo Yufei immediately went to Zheng Yuxuan's home, preparing to ask her about Sun Jinyu's recent situation and learn about the possibility of Sun Jinyu's suicide from the side.

"Hello, from the Criminal Investigation Detachment of the Jing'an City Public Security Bureau, there are some situations I want to learn from you."

"Okay, you two, please come in."

When the police suddenly came to the door, Zheng Yuxuan behaved very naturally, and it seemed that she had learned of Sun Jinyu's death.

"Sun Jinyu is your ......"

Before Lu Ke's words were finished, Zheng Yuxuan immediately answered: "He is my brother-in-law." ”

Lu Ke was stunned for a moment, stared at her tightly with a pair of eyes, and continued to ask: "Do you know that he passed away?" ”

The corners of Zheng Yuxuan's mouth raised an imperceptible smile, and she nodded vigorously: "I know." ”

"How do you know?" Lu Ke was a little puzzled, and hurriedly asked.

The occurrence of criminal cases, especially in the process of solving cases, is strictly confidential, and apart from the public security organs, only the family members of the deceased and the persons related to the case who can be contacted by the public security personnel are the only ones who can learn the information of the deceased.

Sun Jinyu died this time, and in addition to contacting Sun Jinyu's parents, the person who knew the news was Ren Jianyun, the major suspect in this case. How did Zheng Yuxuan know?

Zheng Yuxuan explained lightly: "I learned the news from my brother-in-law's parents. ”

"Oh." Lu Ke nodded thoughtfully.

Mo Yufei took a deep breath, spread out the notepad in his hand, and asked while recording: "What do you think about this matter?" ”

"What do you think? What do you mean? Zheng Yuxuan looked at Mo Yufei in a daze, with a hint of surprise in her eyes.

Mo Yufei smiled slightly, and said lightly: "It's nothing, I just feel Sun Jinyu's sudden death, you are not surprised." ”

"Whew!" Zheng Yuxuan waved her hand, and then sneered: "He is retribution." ”

As soon as these words came out, Lu Ke and Mo Yufei were stunned: "Retribution? What retribution? ”

The smile on Zheng Yuxuan's face disappeared instantly, replaced by an eerie horror, and those eyes were more like a bottomless abyss, extremely profound.

She accentuated her tone and said in a cold voice, "He killed my sister!" Now, he died on the anniversary of my sister's death, isn't that a kind of retribution?! ”

Zheng Yuxuan's parents died, and she grew up with her sister, who is also her only relative. The sudden death of her sister gave her a lot of blows, and she heard that the cause of the car accident was Sun Jinyu's fatigue driving, so she hated Sun Jinyu very much.

However, the on-site investigation results of the technical team showed that in addition to the deceased, only Ren Jianyun's biological information was found, and no fingerprints belonging to a third party were found, not even the biological information of the cleaner.

Therefore, although Zheng Yuxuan has a motive to kill, the possibility of killing is not great.

Mo Yufei continued to ask her: "So do you attribute your sister's death to Sun Jinyu?" ”

Zheng Yuxuan sneered a few times with disdain, raised her head and asked Mo Yufei: "Isn't it?" If it weren't for his fatigue driving, would my sister have died? Also, why is it that only my sister died, he didn't even have any injuries, my sister was killed by him! ”

Lu Ke and Mo Yufei did not make any comments on this matter, the traffic accident at that time was taken over by the traffic management department, and it was already a foregone conclusion.

Lu Ke calmed down, and suddenly said to Zheng Yuxuan: "After the car accident, in the past two years, do you know Sun Jinyu's recent situation?" ”

Zheng Yuxuan shook her head and said angrily, "I don't know." Does it matter if he is dead or alive? I hate him! ”

Lu Ke ignored Zheng Yuxuan's words, pretended not to care, and said lightly from the side: "Sun Jinyu has always thought that he killed your sister, he has been living in pain for the past two years, maybe his death this time is also a relief for him." ”

Zheng Yuxuan immediately opened her mouth and corrected Lu Ke's words: "It's not liberation, it's atonement." ”

Lu Ke stared at her, and suddenly the words changed: "So you want him to die so much?" ”

Zheng Yuxuan also reacted immediately, frowned, and asked rhetorically: "Comrade policeman, you don't suspect that I killed him, right?" ”

Lu Ke was still looking at her, and he didn't admit or deny Zheng Yuxuan's problem.

Zheng Yuxuan didn't seem to expect that her reaction would make her the object of suspicion by the police.

After a while, she slowly spoke: "I know a clue that may be useful to you. ”