Chapter 292

Although there aren't many normal people among forensic examiners, compared to Chen Fan, most forensic examiners are actually far too normal.

"When blood within the cardiovascular system lacks the force to circulate and instead pools by gravity along the vascular network into the lower portions of the body, the result is that the vessels in the body's higher regions are empty while those in the lower regions become engorged. The capillaries and small veins in the lower portions of the body fill with blood, and through the skin this appears as dark red to dark purplish-red discolorations. These discolorations begin as cloud-like or streaky patches, and gradually coalesce into sheet-like areas — this is lividity."

In the observation room, among the several celebrities who had arrived, Sister Yuanyuan was the most shocked, and said: "Um, is Chen Fan giving these master's and doctoral students a lecture?"

That remark left everyone present stunned for quite a while.

Teacher He said: "Right, if Sister Yuanyuan hadn't said it, we almost forgot — it really is true that Chen Fan is lecturing this group, and even lecturing these professors. Qin Ming, what do you think?"

Qin Ming said: "What can I think? I look with my eyes, of course. I'd love to spot something else, but Chen Fan really is beyond my grasp. Before, I just felt that Chen Fan and I hit it off and became good friends. But looking at it now, I even wonder if Chen Fan thinks I'm suited for dissection."

"??????"

No, seriously, is that polite? Chatting like that?

Here, Linghua said: "Still, I'm quite curious — where does Chen Fan find so much time that he's willing to put in the effort to research all this?"

Qin Ming said: "Li Tian and I did a criminal profile on Chen Fan. No matter which angle we profiled from, we both felt this guy had definitely killed people, and quite a few at that. But looking at it now, that's completely off. Doing the math, this kid would have had to start killing at age eight, slashing his way all the way to the present, just to have anything to reference."

Everyone was dumbfounded.

Teacher He said: "Who was the reference subject for the profile?"

Qin Ming said: "Cheng Ruofei, who else? That Miss has the highest IQ among us and the best academic record. Using her as the reference, then adding in a bit of Xiang Qinqin's worldly savvy, we got this set of data — and then there was no 'then.' All I can say is, there really does exist a kind of person in this world who loves a certain discipline so much that they end up like this."

Sister Yuanyuan said: "Let me ask one more thing — what about all those bizarre skills of Chen Fan's?"

Qin Ming said: "I think this guy must be running mental simulations every day, figuring out how to kill a person and get away with it without anyone noticing."

Meanwhile, Old Song and Li Tian appeared at the office doorway.

The two said nothing, gesturing for Chen Fan to continue his lecture — although there was a case, there was no rush.

. 0..............................

Chen Fan glanced at the two of them and said nothing more.

He continued his lecture here.

"It is directly related to the posture of the body. In a body lying flat on its back, lividity appears on the back of the head, the top of the head, the back, the waist, both sides of the buttocks, and the posterior aspects of the limbs, and sometimes on the sides of the body, even on inclined upper regions such as above the clavicle. In a body lying prone, lividity is distributed across the face, chest, abdomen, and the anterior aspects of the limbs; at this time the conjunctivae of both eyes also often show a congested appearance. In a body in an upright position, such as a hanging body, lividity appears on the lower limbs, the lower abdomen, and the distal portion of the upper abdomen, mostly purplish-red or dark purplish-red; in deaths from coal gas or cyanide poisoning, lividity appears cherry-red.

Generally, within ten hours, pressing with a finger causes the color to fade, and removing the pressure restores it; if the body is turned over, the original lividity gradually disappears or shifts, while new lividity reappears in the newly lowered areas. Therefore, when forensic examiners examine a body, they often judge the position in which the body was placed based on the distribution of lividity. Lividity is one of the earlier postmortem phenomena, usually appearing 2 to 4 hours after death, reaching its maximum development after 12 to 14 hours, and becoming fixed and no longer shifting after 24 to 36 hours, persisting until the body putrefies."

Here, Old Liu said: "All this is straight from the textbooks — what I want is something different."

Chen Fan said: "The data given are all approximate, and the older the case, the harder it is to pinpoint the exact time of lividity, isn't it? But Teacher, we are forensic examiners — we can't just hand over some vague generalities, can we?"

Old Liu nodded, but this was something that simply couldn't be researched, because the human body itself is the greatest mystery, and no one can guarantee they can truly master its secrets.

Chen Fan said: "Generally, I divide it into three time points."

Old Liu was taken aback for a moment and looked at Li Tian.

Li Tian was also stunned — something was off, this Chen Fan was off.

Damn, this isn't the Chen Fan I know. Shit, not good — this guy's about to start showing off.

"After death, in addition to blood circulation, tissue fluid also settles by gravity into the lower portions of the body, depositing in the tissue surrounding the blood vessels, passing through the vessel walls into the vessels, mixing with the blood and promoting postmortem hemolysis. The plasma, diluted by tissue fluid and stained red by hemoglobin, then seeps out of the vessels — this is the diffusion stage of lividity. Lividity generally requires about 12 hours to develop into the diffusion stage, with rapid cases still needing 8 to 10 hours; the diffusion stage is a continuation of the hypostasis stage. During this period, pressing the lividity with a finger causes only slight fading, and after changing the body's position, the original lividity does not easily disappear, nor does new lividity easily form. Cutting into the skin at the lividity in the diffusion stage, blood droplets gradually flow from the severed ends of the vessels, and a small amount of pale red liquid seeps out from the tissue."

"And at this point, I call it the diffusion stage, in order to prepare for the next stage."

Li Tian's face was full of exasperation. He said: "You watch — I'm not watching anymore. Damn it, this guy's showing off, so annoying. The thing I hate most is someone being more badass than me."

Old Song said: "Mm, and better-looking than you, too."

Damn, no friends, alright?

Here, Li Tian said: "That's about enough. You've said plenty — I'll give you something, let's see how you judge it."

Having said that, he handed a bag to Chen Fan.

Chen Fan opened it, took a look, then took it out and said: "An eyeball?"

"Right, an eyeball. This is what we've found so far. We don't know where the body is — it was found by the crows. Farmers out in the countryside spotted it on the roadside and called the police right away. The officers searched the surrounding area several times, and in the end had no choice but to accept that it was carried there by birds in flight."

Old Liu said: "This thing — I don't even have room in my freezer for it. Aren't you making things hard for my apprentice?"

"But what can we do? What can you do, Old Liu? Let me ask you — can we just ignore this thing?"

Old Liu was speechless.

Chen Fan looked at the eyeball, then at the flesh around it, reached out, and gave it a pinch.

"Mm, it's not impossible to judge. Time of death should be three days ago — to be precise, around ten-something at night, three days ago. Beyond that, I can't get more specific."

"????"

Damn, knew this guy was uncanny.

"Something's off. If it was around ten-something three days ago, then the time the crow found it can't be pinned down, and we still can't locate the body."

Chen Fan pointed at the blackboard and said: "I've told you many times — read more books, but you never listen."

How is this kid scolding people?

"In bodies in water or under freezing conditions, oxygen permeates into the subcutaneous vessels, forming oxyhemoglobin, so the lividity appears red or pale red. In bodies burned to death, due to inhalation of carbon monoxide before death, the lividity in the uncharred portions appears cherry-red. In potassium chlorate and nitrite poisoning, methemoglobin forms, so the lividity appears grayish-brown. White-skinned and black-skinned people have different skin tones, and the manifestation of lividity also differs. Dark skin can mask the color of lividity. As postmortem changes progress, the dark purplish-red of lividity gradually turns to pale green and green, blending with the color of the putrefying body."

Chen Fan muttered to himself, and Old Song was completely dumbfounded. He said: "What what — what is that even saying?"

Li Tian said: "It means this eyeball was either in water or under freezing conditions."

"Yes, there's clearly some lividity on this eyeball — not much, but it's there, pale red. And this flesh — after three days, it should have rotted long ago. It hasn't rotted that fast, hasn't rotted that severely, so it was probably in a special environment. You have to understand, soil always rots things faster than water does."

Li Tian considered it and said: "In water?"

"Best case, in water."

Li Tian understood — if it wasn't in water, then refrigeration would be unrealistic, because crows wouldn't go there. If crows did go there, then someone deliberately killed the person, froze them, and then dumped them out in the wild or something.

Chen Fan said: "Currently, that's all forensic science can calculate. Additionally, I'll give you one more upgrade — this person's eyeball is a bit deformed; this person should have been nearsighted."

Li Tian said: "Anything else?"

Chen Fan stared intently at the eye, thought for a moment, and said: "This person's pupil is telling me that blood entered the eye before death."

'I know — this is just a matter of probability.'

Chen Fan said: "But the eye's adaptive capacity is quite good. Normally there would be damage, so this person must have done something that easily caused things to fly into their own eyes."

Old Song pondered, then said, "Forget it. We've been at this for half a day and still haven't figured it out. Let's just mobilize the community directly and have the masses search here. Also, find a zoologist."

Chen Fan continued teaching.

Around ten in the morning, the director called Old Liu to inform him that the body had been found.

"Director, how did you know?"

"Mm, someone watched the livestream. They research crows and happened to be in the area, so they went out to look. In the end, they found a flock of crows feeding on it. The person is already at the police station. When I called, they seemed quite shaken."

Old Liu hung up the phone and said, "Well, this time, it's still your doing."

"Mine?"

"Mm, your fans helped find the body. But their current state isn't good. You'd better go check on them."

"Teacher, parading our looks isn't what forensic experts do."

"The other party is very beautiful."

The next second, Chen Fan immediately dropped his pen and said, "Let's go! Where is she? I must go and properly comfort my fan. I absolutely cannot let my fan suffer any grievance."

PS: Please subscribe and follow for updates. Thank you.

PS: Please give many follows and subscriptions. Thank you.