Can a capsule-sized amount of potassium cyanide powder cause death in a short period of time?
Su Ming's question.
The eyes of everyone present instantly lit up, and they all thought of a possibility at the same time.
Shen Lin was stunned for a moment, then used her professional knowledge to seriously affirm.
"Of course."
"Take the common medicines in our country as an example. The weight of the powder in the capsule is between 0.5 grams and 1 gram."
"Of course this refers to the weight of the drug powder inside the capsule, not the weight of the entire capsule."
"The lethal dose of potassium cyanide is roughly between 0.1 gram and 0.2 gram, which can cause an adult to die from poisoning in a short period of time."
"If the dose is raised to 0.5 grams, or even more than 1 gram, I think once the capsule shell dissolves, it will inevitably cause people to lose consciousness, suffer limb cramps, or die from a myocardial infarction in a very short period of time."
"A large dose of potassium cyanide in a short period of time would cause a person to go into a coma due to cardiac arrest, and naturally there would be no time to call for help."
"at the same time."
"If the capsule shell that encapsulates the powder is made of different materials, the time it takes to melt in the stomach will also be different, which can control the timing of the crime to some extent."
"And the most important point is..."
"Even though cyanide kills very quickly, the gelatin capsule shell only needs warm water to dissolve it."
"So even if the victim has no vital signs, the gradually decreasing temperature can completely melt the capsule shell, so that no capsule shell can be found in the stomach contents during the autopsy."
"Cyanide will be absorbed by the mucous membrane at the bottom of the stomach and dissolve very quickly in the blood."
"As long as the victim's body is found within an hour after death, the symptoms of death from consumption and injection are basically the same."
After Shen Lin shared this professional forensic autopsy knowledge.
Even though Liu Yang's criminal investigation skills had deteriorated and he was now more adept at officialdom, he immediately understood Su Ming's intention in asking about the capsule.
Bai Yu, who was wearing a suit, played with the pipe in his hand and analyzed thoughtfully.
"According to Brother Ming's idea."
"Then the method used in this cinema poisoning case should be..."
"The murderer did not inject the cyanide poison into the victim with a syringe, but concealed it in capsules."
"We only need to process the gelatin shell that wraps the powder, and then we can naturally control the approximate time when the victim will be poisoned."
"Then."
"The pinhole wound on the victim's buttocks is probably just a false clue used to confuse people, but I feel like we can roughly determine the murderer's location."
"First of all, normal people would not take medicine handed to them by strangers, but now the victim has a high probability of dying after taking the capsule medicine, which means..."
"It is very likely that the murderer knew the victim, and the two of them had a very close relationship, which allowed them to swap the drugs."
"Secondly, if you want to create a needle hole wound on the victim's buttocks, it is not difficult to create it if the victim is a close friend. You can do it during a fight or hide the needle in the bed."
"Under this inference."
"Then the murderer in this case is most likely someone who is familiar with the victim."
"Ordinarily, once a crime occurs, the people around the victim must be cleared of suspicion immediately. However, the special nature of potassium cyanide must have caused the Xiangcheng criminal investigation team to ignore this point at the time."
"because."
"Cyanide kills very quickly. In just a few minutes or even seconds, the victim can die from myocardial ischemia."
"In addition, the pinhole wounds on the victim's buttocks found during the autopsy undoubtedly focused the police's attention on the seats in the cinema or the people at the scene."
"And the real murderer only needs to have an absolute alibi when the victim was encapsulated and killed, and then he can completely clear himself of suspicion in the eyes of the police."
"This is a common method used in Conan and other crime-solving works."
"But we have to admit that it is indeed very effective in evading police detection, especially when coupled with the deadly toxicity of cyanide."
"It is true that there is a possibility of omissions..."
Hear this.
Liu Yang recalled seriously for a few seconds, then shook his head and frowned.
"wrong."
"I just recalled that our Xiangcheng Criminal Investigation Team originally set its main target near the cinema to screen for potential perpetrators."
"But out of rigor, we also checked whether the victim had taken any medication or sought medical treatment for illness."
"But there was no result either. For at least a few weeks, the victim had no record of spending money at the hospital."
"There was no evidence of drug metabolism residue in the blood after the autopsy."
Regarding Liu Yang’s rebuttal and confusion.
Su Ming didn't think much about it and immediately told the story.
"Director Liu, you forgot a detail."
"I looked at the file yesterday. The victim is a graduate of software engineering. His family's financial situation is not good, so he applied for poverty-stricken students."
"I even applied for a government-subsidized student loan for my tuition, and I was very frugal in my daily life and meals. After I started working as a programmer, my financial situation improved a little, and I was able to go to the movies and so on."
"But considering the victim's usual frugality, is there a possibility that..."
"Even if he didn't finish taking the cold medicine, he would save it for the next time he catches a cold."
"If the physical discomfort is caused by the same symptom, there is no need for the victim to buy medicine again. He can just take the remaining medicine from before."
This moment.
Liu Yang was stunned for a moment. At that time, their Xiangcheng Criminal Investigation Brigade had never thought of this detail.
But Su Ming's deduction was not over yet. He narrowed his eyes and continued to analyze seriously.
"Compared to cold medicine."
"I am more inclined to believe that the murderer may have disguised potassium cyanide powder as stomach medicine."
"Because the victim's job as a coder meant a lot of overtime, he was too busy to have regular meals. Also, in order to save money during college, he probably skimped on breakfast as much as possible."
"According to a professional survey report, among college students, those from poorer families have a much higher chance of suffering from stomach problems than those from better-off families."
"The time when stomach pain occurs is mostly in the evening after eating, or in the morning without eating."
"The deceased was poisoned in the middle of the night. I think it is likely that he had taken a capsule of medicine similar to Omelacio in advance to prevent stomach pain."
"Office workers who suffer from stomach pain all year round will basically have various temporary pain-relieving medicines on hand. People like the victim who are used to being frugal will naturally be reluctant to go to the hospital every time they have a stomachache, so it is normal for them to buy medicines as a backup."
"But here's the problem..."
Speaking of this.
Su Ming paused for two seconds, then tapped the whiteboard and spoke slowly with narrowed eyes.
"Since the victim had been suffering from stomach pain for many years, he must have exercised self-control and would not have overeaten, and would have tried to reduce the number of stomach pains as much as possible."
"Then on the day he was poisoned."
"Why did the victim take stomach medicine in advance? Did he guess that he might have a stomachache that night?"
"Or should I say..."
"He already had a stomachache, but he couldn't bear to give up the movie show he had already bought a ticket for, so he took medicine to hold on?"
"So I now strongly suspect that the victim had a special dinner or party that he could not refuse on the day he was poisoned."
"And the murderer specifically planned this incident around the dinner party that had been notified in advance..."
"Private cinema potassium cyanide poisoning case!"
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