In the "Criminal Mind" department of the University of Rochester.

In order to better see the picture on the projection screen, the lights were not turned on in the entire classroom, and only a man in his 30s could be seen standing on the podium with the help of a faint light.

"The human brain can be subdivided into: frontal, parietal, temporal, and other different regions, and each part of the specific functions, such as the frontal lobe will be in charge of our ability to analyze things, or emotional control, and the parietal lobe is responsible for people's sense of touch, logic, attention and spatial recognition."

With his words, a corpse appeared on the projection screen......

People who study criminal psychology inevitably deal with corpses, but when they see the picture on the screen, there are still a few unnatural nauseous mutters faintly coming from under the podium.

It's not because of how disgusting this corpse is, for these students, they have seen a lot of disgusting corpses, and these muttering are because this corpse has a very incongruous sense of mutilation.

This is the corpse of a slightly chubby middle-aged man, with bright skin, without any corpse spots and wounds, it can be called intact, as long as you look at it, you can roughly guess that this corpse will definitely not be dead for more than 12 hours.

However, a piece of the man's skull was missing...... Not the kind crushed by a blunt object, but incomparably neat, with the entire ring cut off from a centimeter above the eyebrow.

"Name: Andrew Naber, a brain surgeon, whose body was found this morning on the south bank of the Dwee River......" The man on the podium continued: "No, it would be more accurate to say that he was found in a coma with faint signs of life, when he collapsed on the shore in a suit and leather shoes, and the cause of his death was an infection during the rescue process. ”

There was another commotion in the audience.

Lecturer Will didn't ask everyone to be quiet, just switched the photo on the screen, which is a close-up of a head incision: "...... The incision in the skull surgery is very flat, there is almost no bleeding, the main blood vessel is punctured, the other blood vessels are locally anesthetized or closed, and the blood vessels inside the brain are not damaged...... It is inferred from the extent to which the small amount of blood at the edge of the incision dried up that the deceased exposed his brain to the air for at least six hours...... And most importantly...... The deceased's brain was extensively lost. ”

"Lost?" One of the students sitting in the front row was puzzled.

"Yes, the loss, the prefrontal, temporal, and parietal lobes of the deceased were all slightly lost, and this mutilation was very subtle, and the simple extraction of brain tissue avoided all the blood vessels, and the damage was even more slight than in some patients with cerebral infarction...... In short, this allows the deceased to continue to live without brain tissue. ”

"That murderer must have extremely high surgical ability, which can preclude a lot of search directions." One student said again.

Will nodded: "That's true, but the deceased himself worked in a hospital, and there are too many people with this ability in the social circle, and there will be a big blind spot just in the circle of "doctors", so the police have no way to lock on to a certain target." ”

At this time, another student raised his hand: "Then why did the murderer do this?" ”

Will was silent for a moment...... "That's what we're going to talk about in this lesson...... Why did the killer do this? And I think...... The murderer ate the brain tissue of the deceased! ”

This time, the audience was no longer whispering, but an exclamation.

"And the killer didn't just eat them, he even had the dead themselves eat the brain tissue......" Will said.

"I know it sounds ridiculous, but it's not a random guess, the murderer is very particular about the order of cutting the brain, he first cut the prefrontal lobe, so that the deceased's cognitive ability can be deviated, he does not feel danger, and he has no sense of self-preservation, and then the parietal lobe, during which he avoids all the cortex that affects swallowing and taste, and tries not to touch the parts of the limbs that move.

This is because the murderer wanted to make the deceased taste sensation and wanted him to eat something...... This is important for the murderer.

And finally there is a small part of the temporal lobe, this part of the brain tissue that manages some of the language ability, and the killer keeps it until the end...... Does anyone know why? ”

"Does he want to hear this man?" One student said.

"Yes, the murderer was talking to the deceased while he was eating, and he probably needed the deceased to comment on his cooking skills in order to get a sense of satisfaction that we cannot comprehend.

The deceased's dress was very formal, which was worn when attending important occasions, and on his body, the autopsy had extracted a small amount of rosin powder, and there was a little residual chestnut crumb between his teeth, but the inside of his mouth was very clean, so I was very sure that the murderer attached great importance to "food" and etiquette, he sat opposite the deceased, and even asked the deceased to rinse his mouth with lemonade after the meal.

After that, the murderer released the deceased and let him go...... However, at that time, the deceased was already in a state of cerebral palsy, so he just opened his brain and walked in one direction, and walked for a long time, and finally tripped over a small pebble and lay on the bank of the river, and the mud splashed on his brain tissue, causing a large area of infection......"

Will said...... He seemed to gradually fall into a kind of sleepwalking-like realm, as if he saw himself walking aimlessly on the riverbank......

"Then may I ask ......" A student suddenly interrupted Will's fantasy: "Why didn't the murderer just kill the deceased?" ”

"Why did he kill the dead?" Will even asked rhetorically: "The murderer in this case is not some crime of passion, or a madman seeking some kind of material gain. He knew exactly what he was doing, and he cut open the deceased's head just because he was going to eat the other's brain...... Maybe it's because he thinks that doctors' brains are fuller than other people's brains because they work for a long time.

...... In short, he was just eating.

He regarded these as the necessities of a sparse and ordinary life. Instead of slaughtering, he even felt that eating the food was a kind of spiritual sublimation for the deceased, so he made the deceased dress so formally.

...... He believes that what he is doing is a gift and salvation to the victims.

Yes, if it weren't for him, how many people in this world would be able to eat their own brains? ”

Will said...... Fell into some kind of contemplation.

(Don't make any noise, Uncle Jigsaw will come out next, arguing for a villain, are you all perverts?) Hum! ~Tsundere face~)