In the case-solving group!

The group members were all very surprised when they saw the information uploaded by Guan Hongfeng, which was suspected to be the body of Si Lan.

The body was discovered in 2018.

That summer, a rainstorm washed away the soil on the surface of the forest, revealing the bodies buried there.

Villagers who went up the mountain to trap rabbits nearby discovered the bones.

After the police arrived at the scene, they first confirmed that it was a female corpse.

Based on the degree of skeletonization, the time of death was determined to be 8-13 years ago.

The reason for such a large span is that the body after skeletonization is not like the body that has just died. It has livor mortis, rigor mortis, body temperature, etc., which are manifestations that are highly correlated with the time of death.

What's more, even with these symptoms, the time of death is also a range.

Skeletonization is affected by many factors, such as whether the corpse is exposed to air, environmental humidity, average temperature, etc.

And the longer the time of death, the more difficult it is to determine the exact time of death.

It is usually necessary to find other basis for judgment.

Forensic pathologist Qin Ming: "The forensic pathologist in charge of this case was very professional.

The burial site is in the mountains and forests with many trees.

The basis for the forensic doctor's final determination of the exact time of death was the tree roots.

Digging a hole to bury the body will cut off the original tree roots, and new lateral roots will grow after the break.

Digging a hole to bury the body is similar to loosening the soil and applying fertilizer.

New roots will grow toward the burial site.

By counting the number of new root rings closest to the severed roots, we can determine the specific time when the pit was dug and the body was buried.

In cases of burial in the mountains, if the victim has been dead for a long time, this is a common method to determine the time of death.

I just read the identification report of the tree root cross-section. The investigation team at that time set the time of death of the victim as 2008, which should be correct.

Considering the thin clothes the victim wore, the time of death was set between May and August, which is very reasonable!

This is consistent with Geng Qingqing's death in early July.

but……"

Qin Ming hesitated for a moment before leaving a message:

"When the female remains were discovered in 2018, DNA testing was performed.

But there is no match in the DNA database.

In other words, no one reported her missing and she was not a registered criminal.

The question is!

Her DNA was uploaded to the database at that time.

Si Lan is Geng Qingqing's aunt, so the two are supposed to be related.

The DNA should be a match.

However, when Geng Qingqing's DNA was identified, no match was completed.

Therefore, this corpse is obviously not related to Geng Qingqing."

Detective Tang Qin Feng: "The difference in how the two bodies were handled is also quite obvious.

Geng Qingqing was put into a sack and thrown into a hidden cave.

As for the newly discovered corpse, Team Guan dug a pit and buried it.

Moreover, the pit was dug very squarely, which obviously took a lot of effort.

If the same murderer killed two people, shouldn't they be thrown into the hole or into the pit together?

Why is it so troublesome to dispose of the bodies separately? "

Maori Kogoro: "I also found a suspicious point.

The cause of death of the newly discovered body by Team Guan is different from that of Geng Qingqing.

Geng Qingqing suffered hemorrhagic shock from a sharp weapon piercing the right back of her neck. The murder weapon is speculated to be a long conical thorn.

The corpse discovered by Team Guan was caused by mechanical brain injury caused by blunt force trauma.

The murder weapon is speculated to be a hammer.

In short, the murderer repeatedly struck the victim in the face with a hammer, causing his death.”

Looking at everyone's messages, the group members were a little confused.

The skeleton discovered by Team Guan does look very similar to Si Lan in some aspects.

For example, it is speculated that the deceased's height before his death was about 162cm, similar to Si Lan.

Furthermore, the burial place of the corpses is not only in that forest.

And it is very close to the cave where Geng Qingqing's body was found.

But if we say that the corpse is Si Lan, there are indeed many doubts.

Not to mention the differences in cause of death and burial method, but the fact that the DNA didn’t match was a huge problem.

Guan Hongfeng thought for a moment:

"I don't dare to say it now, that corpse is Si Lan.

But I can add a little bit of information.

There are not many unidentified bodies in the database of the Xinyi District Investigation Bureau.

There are only two people who are confirmed to have died in 2008.

The other body was a male who died in winter and was found on the roadside.

The only female corpse that resembles Si Lan is the one I found.

in addition!

I have actually thought about the DNA issue that Forensic Doctor Qin mentioned.

The relationship between Si Lan and Geng Qingqing as aunt and nephew came from the confessions of Zheng Tianli and others.

It is not certain whether it is accurate or not.

Even if they are really aunt and nephew, it is not certain whether they are real aunt and nephew or just called casually according to their seniority.

And even if there is a real relationship, if the distance is far, it is difficult to identify DNA after five generations."

Tang Ren: "Aunt Jie is also a cousin?

The two may be distantly related, perhaps inherited from their great-grandmother?"

"This is possible!"

Qin Feng left a message:

“The identification method commonly used in DNA offices nowadays is STR testing.

Direct descendants within three generations can be successfully identified.

However, collateral relatives who are three generations apart may or may not be matched successfully.

It requires multiple identifications or judgment in combination with other evidence.

Relatives beyond four generations cannot be matched.

So what Captain Guan said is entirely possible."

Chen Ting: "Then can we ask the DNA lab to conduct another test on Geng Qingqing and the remains?"

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