Looking at the corpse lying on the ground, a glimmer of inspiration suddenly flashed in Gu Fan's mind, but it was only fleeting.

As time went by, there were more and more people watching the excitement, Gu Fan refused the interview he remembered, said goodbye to Huang Zimeng and Officer Niu, and disappeared into the crowd with Gu Yue.

The roads became congested with homicides, and there wasn't even a taxi on the way.

Gu Yue looked at Gu Fan, who was contemplating with her head down, and drove away the mosquitoes around her.

"Smack!", Gu Yue looked at the bloody mosquito corpse in his hand. "Let you bite me, you damn mosquito, the smell of my mother's blood. ”

Gu Fan stopped and looked at Gu Yue, "Did you just say blood incense?"

Gu Yue looked at Gu Fan in front of him, frowning and scared, "You don't want to suck my blood, do you?" ”

Gu Fan raised his head and looked at the sky and closed his eyes. The large vein in the neck was quickly cut, and the blood must have spurted outward, and the police arrived at the scene of the murder for about ten minutes at most. The killer did not have time to deal with the bloodstains at the scene and the bloodstains on his body, proving that the murderer was behind the scenes. There must have been the murderer's dander tissue at the scene, but the police did not find the murderer through this clue, proving that the police station did not have the murderer's DNA sequence, which means that the murderer had no criminal record. So how did the murderer escape the pursuit of the police, and how did the murderer escape the police on-site investigation after the murder?

Gu Fan's mind kept recalling, thinking about the first case he encountered, well, today's cases were combined with each other, "The first murder case was wearing underwear, the second was neatly dressed, the hair was neatly combed, and there was the fragrance of shower gel on the body, which proved that I had just taken a bath." What kind of person would be gay?"

Gu Yue stood beside Gu Fan and listened to the analysis of the case in his mouth, and followed Gu Fan's train of thought and was also thinking. "Well, the murderer is ugly and doesn't have a girlfriend. ”

Gu Fan looked at his sister, "The cause of gay men is emotional trauma, and it may also be the search for stimulation. Lesbians, like ordinary lovers, treat each other as emotional partners. ”

"I'm angry if my partner betrays me, and it's still gay. Gu Yue said the words in his heart.

Gu Fan was surprised by Gu Yue's idea, but quickly denied it, "The murderer killed four people in a month, which proves that he did not regard each other as a romantic partner." ”

Gu Yue bit the nail on his thumb, "Then he is taking revenge on gay men, and the murderer has disgust for gay men in it." ”

"Yes, your analysis makes a lot of sense. The murderer is disgusted with gay men, but he can't give it up. He enjoys the pleasure that men give him, and at the same time he is tired of this life. Gu Fan analyzed the murderer's heart, "The murderer is about 1.7 meters tall, has no criminal record, and there are no fingerprints at the scene, which proves that his fingerprints have been erased, or deliberately dealt with." The murderer committed the murder during the day and either had to go back at night or was a night shift worker. ”

Gu Yue rubbed her not smart head and complained, "Now that the roads and communities are monitored, why haven't the police caught the murderer until now?" ”

Hearing Gu Yue's words, Gu Fan instantly thought of the strange man who went to the hospital to get medicine in the community that day. The person left the community two hours after the police left, wrapped in a windbreaker, wearing a mask, height, physical characteristics, and the smell on his body were completely consistent with the murderer in his heart.

"If the murderer did not leave the community before the police left, even the police would not be able to find the murderer even if they checked the surveillance. Gu Fan snapped his fingers and said.

Gu Yue heard Gu Fan's analysis and nodded again and again, "Yes, yes, the police will only look at the surveillance before and after the murder, not the surveillance video for a few hours after the murder." ”

The murderer grabbed the hearts of the police, and then waited until it was dark to leave, and was able to avoid the crowds during the day. Gu Fan gave the answer.

"Didididi" mobile phone rang, and Gu Yue looked at the caller ID to see if it was her mother's phone.

Hanging up the phone, Gu Yue looked at Gu Fan, "Mom, urge us to go back quickly." Let's go, handling the case is a matter for the police, the two of us are analyzing clearly, there is no authority to handle the case, what's the use. ”

Gu Fan thought about it, even if the murderer was in front of him, he had no right to arrest him.

Stopped the car, and the two took a taxi home.

Gu Yue asked a question in the car, "Is there no way to give first aid if the major artery is cut?"

Gu Fan thought for a while and said, "For example, a person weighs 60 kilograms, and the blood volume accounts for about eight percent of the body, which is 4,800ml. The contraction of the heart can spurt blood out of a height of 30 feet, which means that the blood flow rate is at least 25 milliliters per second, and the human body will go into shock when the blood flow reaches 25 percent, which means that it will take 48 seconds to go into shock, and it will die in about 1 minute. I'm not talking about the large arteries in the neck, which act directly on the heart and brain. The brain hesitates to get no blood supply, which will accelerate the exhaustion of the body, and the shock time will be advanced to about 30 seconds. The time of death is expected to be around forty to fifty seconds. ”

The driver who was driving heard Gu Fan's narration, linked to the news on the radio just now, took a breath, and his hands holding the steering wheel couldn't help but tighten. "What you're saying, young man, is scary. Is there any way to experience arterial bleeding?"

Gu Fan looked at the driver who looked at him in the rearview mirror, "Generally, the artery is deep under the skin and will not be easily cut." Even if it is cut, it is only a slight abrasion, or cracking. At this time, do not panic, and tie the top of the wound with a rope or gauze, which is the closest place to the heart, which is the proximal end of the heart in medicine. This can effectively reduce the outflow of blood, and it is still too late to rush to the hospital or call the emergency number in time. ”

Gu Yue gestured on his neck, "You help me see, which is the near end." ”

Gu Fan turned his head sideways to see Gu Yue stretching out his slender neck, gestured with his fingers, and told her with a wry smile, "This method is only applicable to the area below the neck." ”

"Why?" asked Gu Yue, puzzled.

The driver master heard Gu Yue's cute words and smiled, "Little girl, don't pinch your neck, can you still breathe?"

Gu Yue's face turned red when he heard the driver's laughter. Hurriedly changed the topic, "How to distinguish arterial bleeding from venous bleeding." ”

"The blood that flows in the arteries of the systemic circulation, and the blood that flows in the pulmonary veins in the pulmonary circulation, contains more oxygen, contains less carbon dioxide, and is bright red in color, is called arterial blood. The blood that flows in the veins of the systemic circulation, as well as the blood in the pulmonary arteries in the pulmonary circulation, contains less oxygen, contains more carbon dioxide, and is bright red in color, which is called venous blood. I say this, maybe you will be in a hurry when you have an emergency, and you can't tell the difference. I'll just put it simply, the amount of bleeding is large and acute arterial blood, and the amount of bleeding is small and slow is venous blood. Gu Fan looked at the two people and became even more confused, so he no longer used medical terms to explain to the two people later, for fear that the two people would not understand if they explained too much.

The driver, master and Gu Yue nodded at this time, and understood how to distinguish arterial blood from venous blood.

The driver master is also a person who can speak, "I don't know what's going on recently, there is a murder case every week, which makes people panic, and my family doesn't let me pull guests at night." The driver seemed to think of something, "How to save yourself if the major artery in the neck is cut." ”

Gu Fan leaned on the back seat and rubbed his sour eyes, "The major artery in the neck is slightly cut, first find the bleeding location and the injured blood vessel, feel the arterial pulse, use your thumb to tightly press the artery rupture near the heart 1-2 cm to stop the bleeding, and call the emergency number for help." The place that must be pressed must be 1-2 cm near the heart of the rupture, if only the rupture, it will not have the effect of stopping bleeding. Try to sit still or lie down and wait for help. Do not drink water, which will dilute the blood concentration and reduce the oxygen carrying capacity in the blood. ”

"What if it's cut?" Gu Yue asked cautiously.

Gu Fan turned his head sideways and glanced at Gu Yue, "It's also effective, but it won't take too long." If the brain is not supplied with nourishing qi, the human body will gradually lose consciousness, the body will not be able to control itself, and finally the fingers pressing the arteries will be released, and it will be the same. ”

Gu Yue asked reluctantly, "Someone helped with the press?"

With a long exhale, Gu Fan replied, "If the brain does not get oxygen within five minutes, the brain cells will be irreversibly damaged. Brain cells are not as renewable as other cells, and brain cells are non-renewable. Think for yourself. ”

"The most common breath-holding time in the world is more than thirteen minutes. Gu Yue said unrelentingly.

Gu Fan shook his head, "Holding your breath and stopping the offering under acupressure are two different things. Holding your breath means that your lungs still have oxygen to you, and it's one thing for acupressure to cut off the oxygen supply. ”

Hearing Gu Fan's explanation, Gu Yue lowered his head like a defeated rooster.

Gu Fan patted Gu Yue's back, afraid that she would recur in combination with the dream and comforted, "Actually, when I say five minutes, I mean that brain cells begin to die, and there is still a period of time before the real brain death." ”

Hearing Gu Fan's words, Gu Yue looked at Gu Fan in surprise and leaked a happy smile.

The driver looked at the two people sitting in the back row and laughed, "Thank you, young man, you have taught me a lot." ”

"You're welcome," Gu Fan replied with a nod from the driver's master.