"Poison in the bathing center?"

"It's hard to say." Zhong Xin shook his head and said: "Acute thallium compound poisoning generally has an incubation period of twelve and twenty-four hours, and the length of the incubation period and the severity of the symptoms are related to the type of compound and the dose of intake.

As for toxicity, although it is not as good as cyanide, it is also highly toxic, and the minimum lethal dose to én is as low as 12 milligrams per kilogram, and the dose reaches a certain level, which can also cause lightning death after an acute toxic reaction.

The five deceased, the tongue is red and swollen, there is inflammation, the oral mucosa is red and black, coupled with various typical symptoms, the possibility of oral thallium salt poisoning is not low, of course, it cannot be ruled out that the food provided by the bathing center contains thallium, it is recommended to take samples back for testing. ”

After a pause, Zhong Xin continued: "However, this possibility is relatively small, considering the incubation period of thallium salt, and the fact that the poisoned people are all in a small group, and the rest of the customers have no signs of poisoning, it stands to reason that there should be something wrong with what they ate before coming to the sauna."

To sum up, in this case, I believe that the possibility of accidental poisoning is relatively high, and the possibility of other poisoning is small, but it cannot be ruled out. ”

Su Ping nodded, and then shouted: "Fang Chang! Fang Chang! Come here. ”

Fang Chang heard Su Ping's shout, hurriedly put down the work at hand, rushed over, and asked, "Team Su, what's wrong?" ”

"Have you asked them about the day's itinerary?"

"No," Fang Chang pouted: "They all have some symptoms of poisoning, and they were all sent to the hospital, how can you ask?" But Xiao Wang followed, probably asking, I'll make a phone call? ”

"Well, hurry up."

"Okay." He took out his mobile phone, called Wang Zhao, and after talking for a few minutes, hung up the phone and said: "I asked clearly, the fast food they ate at noon yesterday was not eaten together, and in the evening, they had a hot pot at the boss's house."

After eating, about seven o'clock, they went to the KTV to sing again, came to the bathing center at eleven o'clock, took a bath after eating the supper buffet, went to the public rest area to sleep, got up and ate the buffet breakfast and planned to steam in the sauna, but something happened. ”

After a pause, Fang Chang continued: "A ticket in the bathing center can be used for twelve hours, and it stands to reason that they will expire at twelve o'clock at noon, and they still want to have lunch in it before leaving, but I didn't expect this to happen."

In addition, these guests in the morning are basically the evening group, some of them are gone, but more are still left, and on weekends, rest and rest, just relax.

From this point of view, only they were poisoned, and the other customers didn't have anything to do, and it is estimated that the problem should be the hot pot they ate last night.

The probability of having problems with last night's self-help is relatively small, and there is no way to check, the uneaten ones are all poured, around five o'clock in the morning, the swill buckets were taken away, of course, these swill buckets may not have been sent to the farm, call to ask maybe they can be recovered. ”

Su Ping glanced at him: "Then this task will be handed over to you." ”

"Huh?" Fang Chang's expression flickered.

"Lao Su teased you." Xun Mu waved his hand: "Go and do a blood test for other customers who have also eaten buffet supper, and it will be clear if there is a problem with supper." ”

"Okay!" Fang Chang breathed a sigh of relief, hurriedly nodded and ran to work.

Su Ping called Chai Ningning again, and asked her to investigate the scene here, and then take Brother Song, Qi Yuan and other criminal police to the murdered boss's house, the hot pot may not be confiscated, and it can be investigated.

……

At eleven o'clock, Chai Ningning and others arrived in Suqin Huacheng, found the unit building where the murdered boss lived, opened the door with the key found in his locker, got on the elevator, went straight to the twelfth floor, found his house again, and opened the door.

At the same time, Chai Ningning explained: "After a preliminary investigation, the murdered boss is named Su Haohu, divorced, has a daughter, the daughter is 16 years old this year, and was sentenced to be raised by his ex-wife, he currently lives alone, and there is no one at home." ”

Brother Song and the others nodded lightly and didn't say anything.

Soon, the door was opened, and several people put on gloves and shoe covers, and rushed in.

His house is quite large, a set of large re-examinations, the construction area is 140 square meters, and the second floor of the duplex is also 80 square meters, and the usable area is not small.

The house generally looks neat and clean, but the dining room is a mess, there are some soup and oil stains on the table and floor, and several rows of shoe prints extend from the reflection all the way to the entrance, and the insoles are especially dirty.

When many people have dinner and drink, it is inevitable that they will look like this.

The trace inspector quickly walked to the dining room, carefully avoided the stains on the ground, took pictures of the table for a while, and then began to collect the samples, packed the dipping bowls used by everyone, took some vegetable leaves, scooped some hot pot soup, carefully stored them, and put them in the building materials box.

Chai Ningning walked to the kitchen and took samples of oil, salt, sauce and vinegar and other condiments for testing, and Brother Song and Qi Yuan assisted in the records.

After collecting almost everything, everyone returned to the detachment and sent the materials to the laboratory for testing, and Brother Song and Qi Yuan found Xun Mu to make a brief report.

But he still stayed at the scene, and after inquiry, Su Ping was in the forensic laboratory, and the two went to the first basement floor to look for it.

Entering the dissection room, he briefly told Su Ping about the situation, he nodded lightly, and said: "Just now, the Armed Police Hospital and Lao issued a test report on thallium sulfate poisoning at the same time. ”

"Well," Zhong Xin took over: "Thallium salt poisoning is extremely insidious, whether it is an accident, or poisoning by others, chronic poisoning, or acute poisoning, it is difficult to be detected, and the symptoms are easy to be misdiagnosed as food poisoning, or acute gastroenteritis."

If it weren't for the fact that I had handled a case of thallium poisoning, and in addition to gastrointestinal symptoms, these poisoned patients also had the characteristics of weakness in the lower limbs, numbness, and a metallic taste in their mouths, and five people died of poisoning on the spot, I am afraid it would be difficult for me to think of thallium poisoning in the first place. ”

Su Ping nodded lightly: "The medical staff at the scene didn't expect it at first, but it was only after the old reminder that they realized that it might be thallium poisoning, and finally the hospital conducted a directional examination before it was diagnosed." ”

Zhong Xin said while stitching up the corpse: "In addition, thallium sulfate was used as rat poison and insecticide earlier, but in recent years, it has been used very little.

Thallium sulfate, on the other hand, is mainly used as an experimental reagent, and it is not easy for ordinary people to get their hands on it. Of course, some small places may still use thallium sulfate as a rodenticide, but Yuqiao should not have it anyway. ”

"So, it should have a low mistaken rate, right?" Su Ping asked.

"It stands to reason that there is a greater possibility of chronic poisoning caused by accidental ingestion, and the possibility of acute poisoning should be very small," Zhong Xin said, "so it cannot be ruled out that he killed him." ”