Chapter 79 Couple Butcher: EEG
Mu Mian and Forensic Doctor Cheng got along very well. With Mu Mian's help, Forensic Doctor Cheng performed another autopsy on the body, and then he came to the same conclusion as Mu Mian.
"Forensic Doctor Cheng, did you find this kind of dry gelatinous substance on the body you dissected?" Mu Mian took a piece of dandruff-like substance from the scalp of the deceased, "Like this?"
"What is this?" Forensic Doctor Cheng looked at it carefully for a while, and he murmured, "This seems to be some kind of gel, in a dried state. When the body was found, the hair was full of mud and sand. We cleaned it up, but the cleaning work was done by my assistant, and I'm not sure if there is any."
"Okay." Mu Mian was a little disappointed. It would be great if she could dissect that rotten corpse. She would surely find some clues.
"Why did you let them cremate that corpse?" Mu Mian said dissatisfiedly.
"The family members came to my office crying and shouting every day, clamoring to cremate the body. I couldn't do anything!" Forensic Doctor Cheng stretched out his hand, with several healed scars on the back of his hand. "Look, in order to protect the body from being stolen, they scratched the back of my hand."
"What a coincidence, I was also scratched by the family members of the deceased," Mu Mian also showed her own scars from being scratched by Ye Zeling, "But my scars are not as deep as yours. I only have three, and you have five."
Chen Xue, who was making the autopsy records, felt speechless. What was there to talk about in such a thing? They even started to compete with each other.
"Yes, being a forensic doctor is also quite dangerous."
Once the conversation started, Forensic Doctor Cheng began to impart his experience to Mu Mian, such as how to avoid occupational exposure when encountering corpses with AIDS, the need to wear a gas mask to avoid poisoning when dissecting highly decomposed corpses, and how to avoid being beaten by the victim's family...
Mu Mian frequently showed an expression of "Wow, I learned it, I learned it again."
"Among the six corpses in Linzhou, three corpses have rose teeth. Did you find this?" Mu Mian asked.
"I found it. But this can't determine the exact cause of death of the deceased. I can only guess that the deceased had a process of suffocation."
"I suspect that the three deceased also died of electric shock."
"Your guess makes sense. There are indeed cases showing that rose teeth appear on corpses killed by electric shock." Forensic Doctor Cheng agreed.
After the autopsy was completed, Forensic Doctor Cheng left the autopsy room.
Chen Xue whispered, "Mianmian, don't tell Forensic Doctor Cheng all the clues. He is on Team Sun's side. We are in a competitive relationship now."
"Why? I was just having an academic exchange with him. We had a very pleasant exchange." Although Mu Mian has a lot of theoretical knowledge, she does not have as much practical experience as Forensic Doctor Cheng. She feels that she has learned a lot.
For example, she knows that if the victim's family members want to beat the forensic doctor, they should immediately hold their heads and squat on the ground, shouting for help, so that they will not be easily injured when they are beaten.
"Well...it's okay." Chen Xue thinks that it is better not to force those workplace rules on Mu Mian. Come to think of it, as long as the case can be solved, does it matter who solves it?
No, it is still very important!
During lunch, Mu Mian found that Xiao Zhang was depressed, and Chen Xue followed him.
Today they had Gong Bao Chicken. Mu Mian secretly put the carrots, cucumbers and peanuts in her bowl into Fang Rui's bowl, and then scooped the chicken that Fang Rui didn't like into her own bowl.
Fang Rui was used to her little tricks, and waited helplessly for her to finish picking the dishes before starting to eat.
When Mu Mian started to pick up his chopsticks, Xiao Zhang and the other two were still unhappy.
Mu Mian finally realized that she should say something.
"Officer Xiao Zhang, Chen Xue, why are you unhappy?"
"Ah, we've been working in vain these days. We originally found a suspect, but who would have thought he had an alibi." Xiao Zhang sighed heavily, and he lowered his voice and said, "The bad thing is, I heard that Captain Sun and the others have also made progress, and it seems that they have found the suspect."
"Don't worry, I also found a clue." Mu Mian looked up and said confidently.
Fang Rui looked at Mu Mian, "Did the autopsy reveal anything new?"
"Let's eat first, I'll report to you when the report comes out this afternoon. Today's Gong Bao Chicken is delicious."
Chen Xue looked at the full chicken in her bowl, then at the vegetable stew in Fang Rui's bowl, and couldn't help saying, "Uh... your bowl can only be called chicken."
"..."
At around three o'clock in the afternoon, the test report finally came out. Fang Rui convened another case analysis meeting.
"I suspect the murderer is doing an experiment," Mu Mian raised the painting in her hand, "He may be doing an experiment about love."
The painting shows two people sitting opposite each other, with electrodes attached to their arms and long wires connected to them. The most important thing is their heads. They were wearing a black hat with many holes on it, and each hole was connected to a black wire.
"The black hat is an electrode cap?" Lin Sen was a little surprised, "You mean, while he was testing those couples, he was also collecting their EEG data?"
"There were signs of washing their hair, using the same shampoo. It should have been washed by the murderer." Mu Mian explained, "But I still found a small amount of gelatin on their scalp. After testing, it was found to be a conductive paste after drying."
"Conductive paste? What is this?"
Everyone was confused. Only Lin Sen knew what Mu Mian was talking about. EEG equipment is the most common equipment in psychology laboratories.
"When doing EEG experiments, in order to reduce the electrical resistance of the scalp, a large amount of conductive paste will be applied to the scalp connected to the electrode." Mu Mian explained, "That substance is very difficult to clean. It takes a long time to wash your hair, but it still can't be washed clean."
Xiao Li asked curiously: "Forensic Doctor Mu, do you often do this experiment? You seem to be very experienced."
"I have never been the main subject of an EEG experiment. But I often serve as a subject. My father said that I am a genius and my brain is very valuable for research. So I often serve as his research subject." Mu Mian's tone was a little proud. Everyone was
speechless. No wonder Mu Mian likes to study the human body so much. It turns out that it is a family tradition.
Lin Sen said: "Regular EEG equipment is very expensive, and generally only laboratories in universities or hospitals around the world will purchase it. We can start the investigation from the purchase channels of EEG equipment."
"Based on the distribution of the conductive paste residue, I guess his electrode cap is 20-channel, which means it only has 20 electrodes. Such equipment is too backward and should be eliminated. The latest equipment has 128 channels. So I suspect he is using equipment that has been eliminated by the laboratory."
Lin Sen frowned: "That's more difficult to check."
Mu Mian continued: "But fortunately, according to the analysis of the ingredients, the conductive paste used by the deceased should be an imported conductive paste, and it is not sold alone, but only provided to customers who purchase their EEG equipment. The brand name of that device is NeurOne."
"Does this device have an agent in China?" Fang Rui asked.
"Yes. It only has one agent in China, and it belongs to Jiang Miao Group."