Xun Mu shook his head slowly, and then said: "Not only the two of them, but also other suspects who may have committed relatively minor crimes and the families of the victims have gained nothing.

As for the hospital...

You should also know that if the suspect's motive is really to take revenge on the hospital, it means that he may have been unfairly treated by the hospital.

For the hospital, this is a scandal. If it is not necessary, it will definitely find a way to hide it.

Thinking about it from another angle, the victim's family was poisoned and the youngest son died, not because of a medical accident, but because someone poisoned him. Apart from the fact that he was poisoned in the hospital, it had nothing to do with the hospital.

In this case, they cannot feel any pressure. It is difficult for them to expose themselves to scandal.

The motive path is not a dead end, but it is difficult to make a breakthrough in a short period of time. Unless you spend a lot of time and energy, repeatedly collecting clues and asking questions, you can solve the case simply by relying on reasoning.

But this is not worth it. If possible, let’s start with the source of the poison. There should be a breakthrough in this direction in the short term.”

"I understand." Brother Song nodded.

After waiting for a while, everyone arrived, and Xun Mu announced the meeting.

Tu Zhongxin stood up first and said: "After a detailed autopsy and detailed analysis of the examination reports of the other three victims...

Forget it, I won’t go into details about the process, let’s just talk about the result. It is estimated that the victim, Li Junfeng, died between 7:20 and 7:30 in the morning.

Combined with comprehensive calculations from pharmacokinetics and other aspects, the poisoning time of the four poisoned patients, including Li Junfeng, was around 6:30 to 7:00 in the morning."

“Oh?”

…”

"No, it's not necessarily them," Tu Zhongxin interrupted Xun Mu and said: "The bottle of physiological saline in which Dushuqiang was found also contained ethyl acetate. In addition, ethyl acetate was found on the sealants of the four plastic bottles.

Removed the extra needle holes.”

"Excess needle eyes?" Su Ping asked, "What do you mean?"

"To put it simply," Tu Zhongxin said: "Normal saline, glucose and invert sugar are common infusion drugs or drug carriers. In addition to being used directly to replenish water, electrolytes, sugar or correct body fluid balance, they can also be used

Used as a carrier for other therapeutic drugs, such as cephalosporins and other antibiotics.

I have seen the prescriptions of four patients, which mainly use vitamin K1 as an antidote. These drugs are injected into normal saline injection and enter the body through intravenous drip. In addition, there are other drugs used for symptomatic treatment.

treat.

Therefore, there will naturally be small needle holes on the sealant of the injection solution. This is because the drug is injected into the injection solution and is unavoidable.

I matched the prescriptions with the infusion bottles one by one. After inspection, I found that there was an extra needle hole in the sealant of the plastic bottle that caused the poisoning of four people.

It is speculated that the murderer's method of poisoning was to first dissolve the drug with ethyl acetate, then inject the solution into these drugs, and then enter the human body through intravenous drip, which ultimately led to the poisoning of the drug."

After a pause, Tu Zhongxin continued: "Of course, you have already guessed the method of poisoning the perpetrator, and your guess is pretty close.

But one thing I would like to add is that the time when the victim was poisoned and the time when the perpetrator was poisoned are two unrelated things.

It is entirely possible that the perpetrator poisoned himself a few hours ago, but it was not until near dawn that the nurse on duty, Zhang Haiming, happened to use the bottle of injection in question..."

"No," Su Ping suddenly said, "I have actually thought about this possibility before, but it can almost be ruled out now."

"Oh?" Tu Zhongxin looked at him curiously: "How do you say that?"

"If this is the case, the victims should be poisoned at different times," Su Ping said: "After all, there are several bottles of injection, and there is a problem with one of them, so there is no reason to say that they all happened to be concentrated between 6:30 and 7:00. Poisoned in time, what a coincidence.

Of course, I also know that the injection of drugs is actually in order and not completely random. If the drugs they use are in a strict order, just pretend I didn’t say that."

Tu Zhongxin was thoughtful, and after a short silence, he shook his head: "The medicines in the first half of the night are indeed in a strict order, but in the second half of the night, the medicines in each bottle of injection are the same, so it is really unlikely It was done too far in advance and I lost my mind."

Su Ping nodded: "Then at least one thing is clear now - the scope of suspects can be locked on Zhang Haiming, Lin Miao and Fenggu. Fenggu's poisoning is unlikely to be carried out through injection, and the possibility is relatively minimal. Lin Miao came second, and Zhang Haiming was the most suspected.

Trace Inspection Department, have you found anything here?"

"We went through a lot of medical waste today," Chai Ningning stood up and said, "and separated the syringes individually and sent them to the toxicology laboratory for identification one by one. Finally, ethyl acetate was found in four syringes. The ingredients of ester and venom are speculated to be the murder weapon.”

"Oh?" Xun Mu immediately asked, "Did you find any fingerprints?"

"Unfortunately, no." Chai Ningning shook his head and said: "The suspect is a medical staff, and disposable gloves are readily available to them. If they have a little anti-investigation awareness, they will wear gloves when they want to commit a crime to avoid leaving fingerprints.

But the problem is not big. The syringe in the hospital cannot be obtained by sealing, and if it is obtained, it is unlikely to be thrown into the medical waste. As for Lin Miao, just check whether she went to the nurse station to receive the syringe before the patient was poisoned.

But we cannot rule out the possibility that she took four syringes in advance, hid them in her pocket, and brought them into the ward for injection, but the possibility is relatively small."

"So the most likely candidate at the moment is still Zhang Haiming, right?"

"I think so." Chai Ningning nodded, thought for a while, and added: "Of course, if evidence can be found to prove that Lin Miao received a syringe or brought a syringe into the ward, then she will be the most suspected Already.

Because intern doctors can only do some work such as changing dressings and removing sutures, while infusion and medication are the responsibility of the nurse. She doesn't need syringes, and she shouldn't use them."

At this point, she paused slightly and then said, "I would suggest that we use Lin Miao as a breakthrough point to find a way to prove or disprove that she had four syringes in her hand.
Chapter completed!