The projector switched, displaying the results calculated by Lu Chuan.

"The victim’s height is between 1.63 meters and 1.69 meters."

"Additionally, yesterday afternoon we identified the nail-like object found in the bone ashes."

The photo switched again, showing the tiny nail-like object discovered in the ashes by Lu Chuan and others.

"This object is made of stainless steel, identified and confirmed to be a bone screw used in fracture repair."

"Typically, these bone screws are quite expensive and are only used in certain small bone fractures."

"I suggest conducting an examination based on the usage of this type of bone screw throughout all city hospitals; we might find some relevant information."

At this point, Lu Chuan’s remark excited everyone.

A small bone screw, though tiny, could lead to a major breakthrough in solving the case due to its rarity.

"Moreover, we also found this in the ashes, a contraceptive ring."

"Thus, it can be preliminarily determined that the victim was female, and we checked some information on this type of ring."

"This is an old-style contraceptive ring that was popular over ten years ago, whereas nowadays most implanted rings are made of silicone or plastic, rarely stainless steel."

"So, it can be preliminarily concluded that the victim’s age should be around thirty to forty years old."

"Combining with the wear on the victim’s remaining teeth, we can roughly narrow it down to between thirty-five and forty years old."

"There are also some button residues, zipper residues, and a bit of iron beads."

"We conducted a detailed analysis."

"Button residues and zipper residues should be from the victim’s clothes, remaining ashes, while iron bead residues could possibly be remnants from a bra wire melted by fire."

"But due to the small sample size, it’s not very conclusive."

Qin Yong listened carefully to Lu Chuan’s report.

Identifying the victim’s gender, approximate height, and age range holds significant value for solving the case.

Although the exact time of death cannot be determined from bone ashes, judging from various traces at the scene, it has been at least over a month.

However, it’s likely less than three months.

Because three months ago, the grass on the mountain was still green, and from the burnt scene, the grass was already yellowed during the burning.

Haizhou City enters autumn, with the green completely fading around mid to late October, early November.

Therefore, the time of the victim’s death should be around mid to late October to early November.

Based on Lu Chuan’s approximate profiling for the victim’s body type, age information, and gender, it can be cross-referenced with missing persons from that time period.

Perhaps the victim’s identity can be determined.

Adding the titanium alloy bone screw, by visiting orthopedic departments in major hospitals, it’s possible to further narrow down the victim’s range.

"Is there anything else?"

Lu Chuan nodded: "There’s another piece of crucial information."

Oh?

Qin Yong did not expect Lu Chuan to have more important information.

"Tell us."

"Skeletal fluorosis!"

Hmm?

Skeletal fluorosis?

Some people seemed to have heard of this disease, but others were quite curious, what is skeletal fluorosis?

Lu Chuan began to explain.

"So-called skeletal fluorosis results from a person consuming high fluoride content water for a long time, or contact with some fluorides, leading to excess fluoride accumulation in the body, causing osteoporosis."

"Generally speaking, outbreaks of this disease are regional."

"For instance, in prairie areas, some parts have high fluoride content in the groundwater, and people living in these areas mostly display similar symptoms."

"It can be considered an endemic disease."

"Are you saying... the victim lived in a place with such an endemic disease?"

Lu Chuan nodded, then shook his head.

"I checked, and within a 300-kilometer radius around Haizhou City, there are no similar endemic disease clusters."

"Which means the victim is likely not a local."

"But we found at the scene a tool the killer used to transport the body, a tricycle."

"Based on yesterday’s investigation by Old Bai and the second team into the three brands of tires, the tricycle’s maximum range is just 200 kilometers."

"Most likely, for the killer’s convenience of disposing of the body, round-trip ease, the chance of refueling midway is very low."

Most people agreed with Lu Chuan’s judgment.

If the killer refueled while transporting the body by tricycle, it might cause unnecessary trouble or even exposure.

Additionally, the murderer’s choice to dispose and burn the body in North Mountain valley suggests a certain familiarity with that area.

Thus, the possibility becomes smaller if the distance was particularly far.

"Of course, not being a local is just one possibility."

Lu Chuan switched the photos again, showing a set of numbers.

"I checked the basic characteristics of skeletal fluorosis."

"Severe skeletal fluorosis, when accumulated to a certain extent, results in dental fluorosis forming on the teeth."

"Because most skeletal fluorosis is caused by consuming over-fluoridated water, when drinking, the teeth are the first to be eroded by fluoride."

"Skeletal fluorosis and dental fluorosis usually coexist."

"However, the fluoride content found in the bones was quite high, indicating severe skeletal fluorosis."

"But we found no dental fluorosis symptoms on the victim’s teeth."

"This suggests the skeletal fluorosis might not have been contracted through oral food intake."

"Apart from oral intake, skeletal fluorosis can also be contracted via inhaling air, skin contact, and other ways."

"Therefore, I believe the victim might have long-term exposure to fluoride chemicals but didn’t live in an area with high fluoride water levels."

"So, I recommend that during the investigation, some efforts should be focused on screening people in Haizhou City who frequently come into contact with fluorides."

Lu Chuan’s analysis proved extremely valuable.

Gleaning so many clues from a tiny residue in bone ash was something no one anticipated.

And now, with the victim’s approximate height information, age, sex, and potential occupational range established, the investigation becomes relatively straightforward.

The first case analysis meeting ended smoothly.

Action Team One and Action Team Two both got busy.

Zhang Hui approximately organized the victim’s basic information and distributed it to all police stations.

Missing persons investigations are primarily concentrated at police stations, increasing the likelihood of identifying the individual.

Soon enough, before noon, information began to pour in one after another.

And among the three pieces of returned information, one attracted everyone’s attention.