Twenty minutes later, Wang Zhao continued to stay in the small conference room to talk to the victim's family, and at the same time enlightened Xun Mu to let him recover as soon as possible, and asked Qi Yuan to go to Su Ping and report the little information he had just asked.

"Sister Xun, has an ex-husband?" Su Ping was stunned.

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

"Haven't you been checking whether Chu Xunliang and Cao Mingyang have offended anyone?" Su Ping sneered and said, "Isn't this one?" ”

"Huh?" Qi Yuan opened his mouth.

"Extreme thoughts, your woman was snatched away by other men, even if you don't have any feelings, are you angry?" Su Ping asked.

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

Su Ping said: "Besides, he was also put in prison by Lao Xun, this Liang Zi is a bit big, he is likely to hold a grudge against the police, Lao Xun and his cousin, and then Cao Mingyang, not to mention that Cao Mingyang still has a 'wife hate' with him." ”

"This ......" Qi Yuan raised his hand and pulled the mask up, saying, "It's too far-fetched, isn't it?" Feel...... Not very reliable Yazi. ”

"There's no other direction here, so let's check it out." Obviously, although Su Ping was suspicious of Sister Xun's ex-husband, he also recognized Qi Yuan's words, which were somewhat far-fetched.

After a moment, he asked, "What's that man's name?" ”

"Didn't ask."

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

After a moment, he rolled his eyes again: "Then go back and ask." Lao Yan just asked me to go over, maybe there is something important to discover, are you with me? ”

"Okay." Qi Yuan thought about it and bowed his head.

The two of them went to the forensic department.

On the way, Qi Yuan asked again: "Team Su, that, has the map detective found anything here?" ”

"No, except for the old man with diabetic foot who has been in the ward and his son, only the doctors, nurses and us have been in." Su Ping said: "Unless it's a medical worker or the father and son, ...... I really can't figure out how the suspect poisoned him.

But the father and son and the medical staff, to be honest, I can't think of their motives. Of course, if there is no direction, these people have to check it out. ”

Qi Yuan was thoughtful.

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

Qi Yuan frowned slightly, a little unbearable to the smell of blood mixed with the contents of the stomach, but that's all, after all, he had seen all kinds of scenes, and with masks blocking it, he quickly got used to it.

"Coming?" Yan Zhongxin looked up and said hello, "The autopsy is not completely complete, but I found this thing in the victim's colon." ”

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

"What is this? Capsule? ”

"Yes, capsule." Yan Zhongxin said: "And it should be made from a resistant starch, or enzymatic resistant starch. It is resistant to digestion and cannot be enzymatically hydrolyzed in the small intestine, but it can ferment with volatile fatty acids and eventually be destroyed. ”

"What do you mean......" Su Ping's thinking was quite flexible, and when he heard Yan Zhongxin say this, he immediately had an idea and said: "The murderer used this resistant starch to poison?" ”

"It should be." Yan Zhongxin thought for a while, and said: "The capsule made of this starch will not be destroyed until the colon, that is, the large intestine, and then release its contents, and finally let the contents be absorbed into the human body.

If the suspect encapsulates the hexavalent chromium salt and allows the victim to swallow it, it can play a 'delayed killing' effect, and the victim will be acutely poisoned hours or even more than ten hours after swallowing the poison. ”

After a pause, Yan Zhongxin said: "It is precisely because of his obvious digestive reaction - vomiting is secondary, incontinence is the key, his pants have a lot of feces, and it is obviously not a posthumous ......

So I suspect that he was poisoned by oral poison, or rather, the poison was in his digestive system. However, no obvious protein structure damage was found in the oral mucosa, esophagus and even gastric mucosa, and there were no obvious symptoms of poisoning.

Moreover, the deceased had not eaten for a while, and after being rescued, he only had time to eat a little liquid food, and the stomach contents that were spit out were those, so the gastrointestinal tract was empty.

I speculate that the victim was worried that the food would squeeze the capsule after he ate it, thus sabotaging his plan to delay the killing, so he deliberately forbade him from eating.

Because digestion is not only chemical digestion, but also physical digestion, stomach acid is one, and the gastrointestinal muscles are active to crush and stir food. ”

"So, the suspect still has a lot of medical literacy?" Qi Yuan was a little stunned and said, "You even know about this kind of thing? Could it be that the murderer is engaged in medicine-related professions? ”

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

Qi Yuan: ???

"Ahem," Yan Zhongxin coughed dryly twice, and said: "I remember that when I tutored my daughter in her homework, I had involved this knowledge, as if junior high school biology was exposed to it, physical digestion, chemical digestion, and resistant starch. ”

Qi Yuan opened his mouth, then the corners of his eyes twitched, and said, "Okay, it's me who is lonely and unheard......"

"It's not called being lonely and unheard, it's called not listening to lectures." Su Ping rolled his eyes.

"That's a good thing you didn't say you can't learn." Qi Yuan shrugged.

"Hey, you're so proud, aren't you?" Su Ping glanced at him again: "It's been a little skinny lately, dare to talk back to me?" ”

Qi Yuan sneered: "No, there is no thing...... However, how did you get this resistant starch? It shouldn't be easy, right? ”

"Potatoes, bananas, and rice." Yan Zhongxin said softly: "Moreover, many enteric-coated capsules and enteric-coated tablets on the market also use resistant starch to avoid irritating the stomach and duodenum, which are prone to diseases and relatively sensitive. ”

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

The protagonist of another family pretends to be slapped in the face all day long, how did he get here, he is pretended to be slapped in the face all day long......

"Alright." Su Ping said softly: "Basically, when we get here, the murderer's poisoning method is clear, of course, it is best to confirm and confirm that this thing is indeed a capsule made of resistant starch, and there is a residue of chromium salt in it, so as to determine that it is finally caused by the poisoning." ”

"I've already had some of them taken and sent to the lab for testing." Yan Zhongxin immediately said: "I think it should be possible to get the result soon." ”

"Okay."