"Detective Bai, I originally thought you were just good at logic, but I didn't expect you to be so professional in on-site investigation and physical and chemical analysis. You are indeed a top student." After Sun Jie left, Chief Zhang called Bai Song aside and said, "Tell me about this banana water."
"I'm not sure yet. I need to see the autopsy results." Bai Song was still cautious: "I'm still not familiar with this place."
"Don't be afraid of making mistakes. Let's assume it was banana water. I also saw the scene and it seemed that the deceased had been in there for so long. Who gave him the banana water and when did they do it?" Chief Zhang trusted Bai Song very much.
"There were no signs of a fight at the scene." Bai Song shook his head.
"So what?" Zhang touched his neck.
"Zhao Han, what do you think?" Bai Song asked.
"Ah?" Zhao Han was startled by Bai Song's shout, and then said: "From the situation at the scene, I didn't go in to take a close look, but they said there were no signs of a struggle, and the deceased tried to come out many times, so he must have taken the initiative to drink."
"Did you drink it on your own initiative?" Chief Zhang glanced at Zhao Han, as if to tell him not to talk nonsense.
Chief Zhang knew all six people from Tianhua City in City A, but he didn't have a deep impression of Zhao Han. He always felt that this young man was dull and not very smart.
"Yes, I think so too." Bai Song agreed with Zhao Han's words.
Zhao Han glanced at Bai Song and didn't continue speaking, but a hint of joy appeared on his face.
"Why would he drink the poisoned water on his own initiative?" Chief Zhang immediately changed his attitude. "If that's the case, how do we define this case..."
"We have also taken a general look at the situation at the scene. Many bottles of ** are not labeled, including banana water." Bai Song thought for a while and said, "Captain Zhang, there is a saying that wine is more fragrant when it is aged. Why is that?"
"Uh..." Zhang didn't expect Bai Song to ask this. He scratched his head and said, "Does it become purer after being left for a long time?"
"Uh..." Bai Song's face was dark. If that's the case, wouldn't alcohol be the most fragrant? "During the storage process, part of the ethanol is oxidized to acetaldehyde, which is further oxidized to acetic acid, and acetic acid further reacts with ethanol to form ethyl acetate, which is ethyl acetate. Ethyl acetate has an aroma, and some blended wines will put some of it, which smells good. Of course, good wines will not only produce ethyl acetate, but also other esters with higher molecular weight, which are very fragrant. Ethyl acetate is in banana water, and the reason why things like benzene and xylene are called aromatic hydrocarbons is naturally because they are fragrant. The deceased was too thirsty and hungry, and thought it was liquor used for disinfection or something, so it is not impossible for him to drink it on his own initiative.
Moreover, as far as I know, the taste of banana water is similar to that of white wine.”
"There's actually such a thing!" Zhang said he had never heard of it before. "I've learned a lot."
"So the cause of death was accidental ingestion, right?" Zhao Han interrupted, "Then was this an accidental death?"
"We can't rule out this possibility." Bai Song said, "For example, the deceased was taking a shower in here, and then suddenly received a message from a friend saying that his wife knew he was here and was coming to look for him. In this case, the man would definitely run away and find a place to hide. This is possible."
"What?" Chief Zhang looked at Bai Song and said, "Inspector Bai is young but very experienced..."
"That's not the case..." Bai Song smiled embarrassedly.
"In this situation, Captain Bai, how do we determine whether it was an accidental death?" Zhao Han asked.
"If that's the case, you usually wouldn't leave your phone behind. And even if you didn't bring your phone and it was picked up by someone else, you would have clothes to take a bath here. This bathhouse will definitely lock your clothes when you enter, right? Ask this one and check carefully to see if there is any cubicle that has been locked for the past few days?"
"Let me ask." Zhang nodded seriously.
If the clothes were all there, then what Bai Song said was possible. Whatever the reason, the deceased had to hide, and then hid in the equipment room, and then something went wrong.
This check was done very quickly. Because this bathing place had people staying overnight, the cabinets were not cleaned at night, so the situation Bai Song described was very likely to exist.
About twenty minutes later, the front desk clerk, waiter, and others checked the entire men's bathroom and found that this situation did not occur.
Because we were temporarily closed today and all the customers were taken away for a simple statement, the inventory was carried out very quickly.
"Have you checked the women's bath?" Bai Song asked.
Zhang Suo had just told Bai Song about the situation when he heard Bai Song ask this question. He grumbled, "How could it be in the women's bath?"
Seeing Bai Song's expression, Zhang was helpless and picked up the phone: "Check the women's bath as well."
"If you act like this, people will think I'm a pervert." Zhang Suo sighed.
Ten minutes later, a message came back saying that there was no women's bath either.
"That's a problem." Bai Song said, "The front desk staff also asked, and no one can remember this man. There are hundreds of guests every day, and the front desk doesn't pay much attention to them. If a man came in wearing only a shirt, he would definitely be remembered, so his clothes must have been taken away by someone."
"So, we still have to file a homicide case." Chief Zhang nodded. "That's not my business. I just know a few people and can help a little. The station police station and their branch will still be responsible for filing the case and conducting the subsequent investigation."
"No rush, let's take a look at the autopsy results later." Bai Song frowned for the first time.
In fact, many outsiders do not understand the daily experiences of police officers.
For example, in Jiuhe District, with a population of one million, if there are five homicides a year, how many unnatural deaths are there?
A conservative estimate is in the three digits, or even two or three hundred.
That is to say, many scenes are very likely to be accidents. After the police go there, if they can be 100% sure that it is an accident, death from illness, suicide, etc., then they will hand it over to the relevant departments for handling. As long as all reasonable suspicions cannot be ruled out, they will investigate it as a homicide until it is finally confirmed.
When Bai Song first started working, he encountered the death of Sun, the insurance fraudster, who committed suicide. Shi, who wrote "I have been wandering for a long time, for ten years, I have failed to show my gratitude to my teachers and friends in life and death" and then jumped off the building, also committed suicide. In addition, he also encountered a large number of other unnatural deaths, none of which were homicides.
Most unnatural deaths other than homicides are easy to find out, but there are also some that are difficult, such as this one.
Now, Bai Song has begun to lean towards homicide, but the evidence is obviously insufficient.
On-site investigation is a big problem. Although Bai Song trusts Sun Jie, he is always worried because Huadong is not there.
As a painter, Huadong is very meticulous and is an expert in trace analysis.
Moreover, there is not even a single camera here, not even at the door. This actually poses a serious safety hazard. After this incident, the boss will be in trouble no matter what.
But now is not the time to think about this. Wang Liang and Wang Huadong have both been drinking and cannot come over.
Liu Shuyuan's on-site investigation ability is also good, slightly better than Bai Song's, but he has also been drinking. Even Bai Song himself is more or less a little dizzy, which affects his judgment.
"Let's take a break first. We don't know how long this autopsy will take." Chief Zhang said, "This case is not ours. Let's wait for the station office to get the files out tomorrow morning, and then we'll take a look at what they have."
"The autopsy won't take that long." Bai Song was still a little drunk and full, so he couldn't sleep. He thought for a while and said, "It's our brother Jie... He is that kind of... very special... very fast."
Sure enough, soon Bai Song received a call from Sun Jie.
"There are some results from the physical and chemical tests, and there has been some progress in the anatomy. I'd like to tell you about the situation." Sun Jie knew that Bai Song was waiting, so he said whatever he had to say first.
Different information is different in the hands of different people.
"There is a small amount of blood in the esophagus, a large amount of mucus in the trachea and bronchi, in a foamy state, and congestion in both the left and right chest cavities. Pink edema fluid and red blood cells can be seen in a large area of alveoli, and the pulmonary interstitium is extensive...
The superficial layer of gastric mucosa has coagulated and degenerated, and some of them have already...
The gastric contents were tested to contain ethyl acetate and xylene, as well as the carbon tetrachloride you mentioned, and acetone was found in the urine..."
"Did the deceased suffer from mechanical injury, mechanical asphyxiation, poisoning by other poisons, asphyxiation due to lack of oxygen, drowning, or other diseases?" Bai Song asked.
"None. His hand was slightly injured. Considering the situation at the scene, it should have been caused by breaking the door." Sun Jie said.
"How long has the injury on your hand lasted?"
"The injury happened no more than 12 hours ago. It was caused by something thrown on the ground today. We found that the deceased had slept on the ground at the scene. At least he went in yesterday," said Sun Jie.
"That means the deceased was familiar with this place. After he entered yesterday or the day before yesterday, he knew that someone would come to open the door every once in a while, so he was not too nervous at first. But today he couldn't stand it anymore and banged on the door desperately. In the end, he drank this thing out of hunger and thirst." Bai Song made an analysis: "According to what you said, he drank banana water without a doubt."
"Yes, that's right. The report is estimated to be out tomorrow morning." Sun Jie said: "I will take a look later and then leave. I will not be the main surgeon here anymore."
"That's awesome! You've even become the chief surgeon?" Bai Song really admired him.
Forensic doctors are actually the same as other doctors who perform surgery. There are chief forensic doctors, and they are basically the ones with the most experience.
"Who knows what Chief Zhang said to the others? They thought I was an expert from the ministry. I had no choice but to go ahead. Otherwise, I would be kicked out if I showed my weakness." Sun Jie was quite experienced. "Fortunately, I have done my job well."
"Okay, you can rest early after you finish your work. I'll take a closer look at the case." Bai Song hung up the phone and said to Zhang: "It's confirmed, he drank too much banana water."
"This is outrageous. I've been doing this for so many years, but I've never seen such an outrageous method of killing people." Zhang cursed, "Is this the legendary fend for oneself? Betting on probability? Betting that no one will open that door in the next few days, and that the deceased will drink banana water?"
"Chief Zhang, you have got the key to the problem." Bai Song nodded. "So, now we need to know two things. The first is whether the cleaning workers go to the equipment room every three days. If not, why did they go there several days later this time? The second thing is that we need to find the boss and confirm where they bought the banana water from and whether the banana water they bought before also contains carbon tetrachloride."
"Is it true that only some people will have the thing you mentioned?" Zhang Suo asked.
"Yes, this is a very common substance. It is an organic solvent that is volatile and has a slightly sweet smell like chloroform. It was once widely used. However, it reacts with water above 500 degrees Celsius to produce toxic phosgene, chlorine and hydrogen chloride gases, which is very dangerous. Moreover, carbon tetrachloride itself is very harmful to the ozone layer. Its use is restricted internationally. Our country also restricts this substance. Banana water produced by regular manufacturers should not contain this substance. This is a manifestation of inadequate process." Bai Song explained: "This physical and chemical property is very basic, and organic chemistry will be learned in college."
"Do you think I've studied organic chemistry in college?" Zhang was speechless. "Okay, I'll follow your idea and find someone to check."
When I encounter a case, I am never afraid of trouble. What I fear most is having no ideas.
"Logically speaking, with so many people involved in this case, how come there is no progress at all?" Bai Song was a little confused.
"Detective Bai, our police force here is not as strong as you think..." Chief Zhang sighed, "Lancheng is still relatively good, it's the provincial capital, but your school still has criminal police officers, how many of them are willing to return to Gansu Province?"
"I don't agree with what you said, Chief Zhang. Let's not talk about you first. Let's talk about the criminal police we met at the scene and the few we met in the hospital. After getting to know them, we can see that they are all professionals. Don't underestimate yourself."
"Uh..." Zhang was a little puzzled after being discovered for being modest. "Indeed, the feedback of clues is a bit slow. I'll call and ask, and by the way, I'll find someone to check what you said."
Chief Zhang is also an outsider in this case, and Bai Song and others are outsiders of outsiders, so Bai Song is worried that they may not have been shared with intelligence. If this is the case, it will be very detrimental to the investigation.
After about ten minutes, Chief Zhang received feedback that the case was indeed stuck.
Because the matter is too suspicious, the criminal police team has opened an investigation into the homicide case. Three or four groups of people have been sent to the scene to conduct on-site investigations, and surveillance cameras in a large area nearby are also being checked.
"Wasn't the station police station in charge of this case at the beginning? Now it's all under the jurisdiction of the criminal police team?" Bai Song said: "It looks like it has indeed been classified as a homicide case."
"That's right." Zhang Suo said.
"The question is, where are the people from the police station?" Bai Song asked.
"Eh?" Zhang Suo suddenly reacted: "Damn, are they going to catch the fugitive without telling me?"
"Let's go and take a look at their office." Bai Song suddenly laughed: "I feel like this case is going in the wrong direction~"
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