Twenty minutes later, Wang Zhao continued to stay in the small conference room to talk with the victim's family. At the same time, he also encouraged Xun Mu to recover as soon as possible, and asked Qi Yuan to go to Su Ping and report some of the information he had just asked about.

.

"Sister Lao Xun, does he have an ex-husband?" Su Ping was stunned.

"Well," Qi Yuan nodded slightly, and then asked with some confusion: "What's wrong?"

"Aren't you always checking whether Chu Xunliang and Cao Mingyang have offended anyone?" Su Ping sneered and said, "Isn't this the same one?"

"Ah?" Qi Yuan opened his mouth.

"To think about it in an extreme way, would you be angry if your woman was snatched away by another man, even if you have no feelings for her?" Su Ping asked.

Qi Yuan's mouth opened wider, and the mask was pulled off his nose, exposing both nostrils.

Su Ping added: "Besides, he was sent to prison by Lao Xun. This is a big problem. He will probably have a grudge against the police, a grudge against Lao Xun and his cousin, and then a grudge against Cao Mingyang. What's more, Cao Mingyang and

He also has a 'hatred of seizing his wife'."

"This..." Qi Yuan raised his hand and pulled up the mask, saying, "Isn't it too far-fetched? I feel... not very reliable Yazi."

"There is no other direction at the moment, let's check it out." Obviously, although Su Ping suspected Sister Xun's ex-husband, he also recognized Qi Yuan's words, which were somewhat far-fetched.

After a moment, he asked again: "What's that person's name?"

"did not ask."

"Didn't ask?" Su Ping put on Yang Tianbao's signature expression.

After a moment, he rolled his eyes again: "Then I'll ask later. Lao Tu just asked me to go there. I may have discovered something important. Will you come with me?"

"Okay." Qi Yuan thought for a moment and nodded.

The two of them walked to the forensic department.

On the way, Qi Yuan asked again: "Captain Su, um, did the detective find anything here?"

"No, except for the old man with diabetic foot who has been staying in the ward and his son, only doctors, nurses and us have been in the ward." Su Ping said: "Unless it is the medical staff or the father and son, otherwise...

I really can't figure out how the suspect administered the poison.

But for the father and son and the medical staff, to be honest, I can’t think of their motives. Of course, if there is still no direction, these people will have to investigate carefully.”

Qi Yuan was thoughtful.

Soon I walked to the anatomy laboratory and saw Tu Zhongxin next to the corpse, staring at an unknown thing with a magnifying glass.

Qi Yuan frowned slightly. He couldn't stand the smell of blood mixed with stomach contents, but that was all. After all, he had seen all kinds of scenes, and with the mask blocking him, he quickly adapted to it.

"Here?" Tu Zhongxin raised his head and said hello, "The autopsy has not been completely completed, but I found this thing from the victim's colon."

As he spoke, he used tweezers to pick up some of the things he had previously studied with a magnifying glass. After letting Su Ping take a look, he put them back into the tray.

"What is this? A capsule?"

"Yes, capsule." Tu Zhongxin said: "And it should be made of a kind of resistant starch, or anti-enzymatic starch. It is resistant to digestion and cannot be enzymatically decomposed in the small intestine, but it can be combined with

Volatile fatty acids undergo fermentation reactions and are eventually destroyed."

"You mean..." Su Ping's thinking was quite flexible. After hearing what Tu Zhongxin said, he immediately had an idea and said, "Did the murderer use this resistant starch to poison?"

"Probably." Tu Zhongxin thought for a while, nodded and said: "The capsules made of this starch will not be destroyed until the colon, that is, the large intestine, and then release their contents, and finally the contents will be absorbed into the human body. .

If the suspect wraps the hexavalent chromium salt in this capsule and allows the victim to swallow it, it can have the effect of 'delayed killing', and acute poisoning will not occur until several hours or even ten hours after the victim swallows the poison."

After a pause, Tu Zhongxin added: "Because his gastrointestinal reaction was obvious - vomiting was secondary, incontinence was the key. There was a large amount of feces in his pants, and it was obviously not excreted after death...

So I suspected that he was poisoned by oral poison, or that the poison was in his digestive system. However, no obvious protein structure damage was found in his oral mucosa, esophagus or even gastric mucosa, and there were no obvious symptoms of poisoning, so I I continued to search, and sure enough, I found this.

Moreover, the deceased had not eaten for a while, and after being rescued, he only had time to eat some liquid food. Those were the gastric contents that were vomited out, so the gastrointestinal tract was empty. This capsule is not particularly difficult to find, otherwise it would have been a waste of time. Make some effort.

I speculate that the victim was worried that the food capsule would burst after he ate, ruining his plan to delay the killing, so he deliberately stopped him from eating.

Because in addition to chemical digestion, digestion also involves physical digestion. Gastric acid is one of them, and gastrointestinal muscle activity is also responsible for crushing and stirring food."

"So, the suspect actually has quite profound medical literacy?" Qi Yuan was a little surprised and said: "He even knows about such a thing? Could it be that the murderer is engaged in medical-related professions?"

Su Ping glanced at him sideways: "This is obviously common sense."

Qi Yuan:???

"Ahem," Tu Zhongxin coughed twice and said: "I remember that when I was tutoring my daughter in homework, I came across this knowledge. It seems that I was exposed to biology in junior high school, physical digestion, chemical digestion, and resistant starch. These."

Qi Yuan opened his mouth, then twitched his eyes and said, "Okay, I am ignorant..."

"It's not called being ignorant, it's called not listening in class." Su Ping rolled his eyes.

"Then it's a good thing you didn't say you were ignorant and incompetent." Qi Yuan shrugged.

"Hey, you're proud of it, right?" Su Ping glanced at him again: "You've been a bit naughty lately, you dare to talk back to me?"

Qi Yuan sneered: "No, it's nothing...but, how did you get this resistant starch? It shouldn't be easy to get, right?"

“Potatoes, bananas, and rice are all there.” Tu Zhongxin said softly: “Moreover, many enteric-coated capsules and enteric-coated tablets on the market also use resistant starch. Try to avoid irritating the stomach and uterus, which are prone to diseases and are relatively sensitive. Refers to the intestine.”

"..." Qi Yuan pursed his lips again.

Other protagonists have been pretending to be cool and getting slapped in the face all day long. How come here, he is pretending to be cool and getting slapped in the face all day long...

"Okay." Su Ping said softly: "Basically, now that we are here, the murderer's poisoning method is clear. Of course, it is best to verify and confirm that this thing is indeed a capsule made of resistant starch, and that it contains chromium. Only if the salt remains, it can be determined that it ultimately caused the poisoning."

"I have already asked someone to take some of it and send it to the laboratory for testing." Tu Zhongxin said immediately: "I think the results should be available soon."
Chapter completed!