Brother Fan's Little Classroom: Lecture 1
(The camera slowly zooms in, and Fan Jinci, wearing a neatly ironed white lab coat, stands in front of the whiteboard. His gray-blue pupils scan the virtual camera, and he picks up a marker with his fingers.)
Brother Fan's Little Classroom: Lecture 1
Research Topic: Mechanical Asphyxia and Rose Tooth Phenomenon
"Today we'll talk about mechanical asphyxiation."
(The pen tip taps the whiteboard, writing "Mechanical Asphyxia")
“When external force obstructs respiratory movement for more than 5 minutes, livor mortis will turn dark purplish-red.”
(Circle "Cyanosis" with the pen tip)
"Focus on the teeth."
(View oral anatomy diagram)
When the pulp cavity is congested and hypoxic, hemoglobin breaks down into porphyrin iron compounds—
(Circle the tooth neck with a red pen)
"After wiping with alcohol, it turns a rose-red color; this is called 'Rose Teeth.'"
(Looks up at the camera)
"Next time you find a body, don't rush to bite your teeth."
(Pen tip pauses)
"Unless you want to break the chain of evidence."
Topic: Leather Variation and Time of Death
"When the stratum corneum of the skin dries out, it hardens and forms a leathery texture."
(Illustration showing the peeling of the skin on the finger)
“In an environment with 35% humidity, the fingertip leather-like process takes 8 hours.”
(Pushed up his glasses with the end of his pen)
"But water corpses may have 'laundry worker hands'—don't be misled by appearances."
(Suddenly turns to look off-screen)
"Yu Yan, put the frozen pork skin down."
(A muffled laugh and the sound of something falling to the ground can be heard off-screen)
Topic: Traumatic Ballistic Analysis
(Holding up a 3D-printed skull model)
"When a bullet enters through the temporal bone, it creates a slope that is lower on the inside and higher on the outside."
(Pointing a laser pointer at the occipital bone defect)
"But if it's .22 caliber..."
(Sudden pause)
"Wen Lin, the potato chip crumbs you ate last night fell into the evidence box."
(A violent cough can be heard off-screen)
Research Topic: Late-Stage Postmortem Phenomena
"When gigantism occurs, gas-producing bacteria in the intestinal lumen cause the abdomen to swell like a drum."
(Showing photos of corpses in the swamp)
"If you see the skin on your fingers peeling off like a glove—"
(The pen tip suddenly turns towards the camera)
"Dr. Li, your computer is searching for my lesson plans in the background."
(A crisp sound of the lid closing can be heard off-screen)
Final knowledge points
(Remove rubber gloves)
"The most perfect crime leaves two kinds of traces:"
(The words "Physical Evidence" are written on the whiteboard)
"Psychological Evidence")
"Physical evidence can be destroyed, but psychological evidence..."
(Circle "Psychological" heavily in red)
"It will be like the butterfly effect, endlessly replaying in the killer's memory."
(Put the silver butterfly ornament into the breast pocket)
"get out of class dismissed."
(Before the camera fades to black, someone sees Yu Yan quietly place the matcha mille-feuille on the edge of the podium, and Fan Jinci's fingertips linger on the cake box for 0.3 seconds.)
(Thank you for your hard work, Teacher Fan!)
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