Attending ex-girlfriend's wedding, arresting the groom's officer on the spot

Chapter 539 Determining the identity of the deceased

The blood of a body that had been putrefying for two weeks had already decomposed, and there was no way to identify its DNA information through blood.

What Lu Chuan collected was hair and nails.

As for fingerprints…

Collecting fingerprints from highly decomposed corpses is a very difficult task. Of course, Lu Chuan is also doing it, but it takes longer.

Moreover, the subsequent fingerprint comparison is also relatively difficult. Lu Chuan's plan is to do DNA identification analysis first. If the comparison is unsuccessful, he will find a way to do fingerprint identification analysis.

Of course, this is just a conventional identification method. If none of them work, you can actually make a restored portrait of the deceased based on his head.

Portrait artist is not a new technical job in the criminal investigation industry.

Lu Chuan even learned this knowledge in college. Sketching criminal suspects based on eyewitness descriptions is a must-have skill for criminal investigators.

In addition, the criminal investigation detachment also has specialized portraitists.

Criminal investigation portraits are different from ordinary painters. Criminal investigation portraits pay attention to realism and draw portraits based on text descriptions.

The key point in this process is not to add your own imagination, thoughts and emotions. The portrait artist focuses on describing the person's emotional changes and language changes.

Of course, due to the advancement of technology in the past two years, portrait artists have also used a lot of model-based things.

Sometimes, witnesses can be asked to piece together a memory portrait of the suspect by selecting the face shape, nose shape, mouth shape, eyebrows and eye shape on the software.

After explaining to Shen Yan, Lu Chuan sent the DNA identification materials collected here back to the current investigation laboratory.

"I'll do it. The results will be available in about seven or eight hours."

Lao Bai's ability in this area was average before, but after recent training from Lu Chuan, Lao Bai can basically use the new equipment in the survey laboratory.

DNA information identification is actually relatively simple among all field survey technical procedures.

This is not to say that it has few steps and is simple to operate. On the contrary, there are many steps for DNA information identification and the operation is very cumbersome, but each step of operation is bound by corresponding procedures and specifications.

As long as the procedures are followed step by step, there is no other contamination of the carrier during the process, and if the amount of carrier is sufficient, the DNA information can generally be identified.

While Lao Bai was doing DNA information identification, Lu Chuan was sorting out the fingerprints just collected from the corpse.

It is quite difficult to collect fingerprints from decayed corpses. After collection, they are all broken and need to be sorted and assembled before fingerprint identification and analysis can be done.

And after finishing this, Lu Chuan will further analyze and judge the footprints found at the crime scene and form a footprint identification analysis report.

Liu Guodong was on two other machines, busy analyzing hairs and fibers found on trees in the woods.

On the one hand, it is to determine whether the hair belongs to the deceased or the murderer. If it belongs to the deceased, it may not be of much use, but if it belongs to the murderer, you can use it to directly target the other party.

The main purpose of fiber analysis is to determine the composition and then compare it with the fiber composition of the clothes on the deceased.

None of this work can be completed in a short while, and the results will not be available until tomorrow at the earliest.

"Old Liu, do you think it is more likely that the murderer premeditated the murder, or that he committed the murder on a temporary basis?"

After working for more than an hour, Lao Bai's work is basically on track. The preliminary processing of the materials has been completed and is now being purified.

In another three hours, when the purification is completed, the things can be put into the machine for testing, and the results will be available tonight.

So the remaining work was all programming work, and Lao Bai breathed a sigh of relief.

Liu Guodong's work has also entered another stage.

The DNA information identification of the hair found on the tree has entered into a process with Lao Bai. The fiber detection is in progress, and it will take three or four hours before the results are available.

Liu Guodong didn't even think about it: "Those who want to kill on the spur of the moment."

Ok?
Handing Liu Guodong a flower, Lao Bai was slightly surprised: "So sure?"

"First of all, the method used by the other party to fake the hanging was too crude. It was definitely not carefully planned and should have been a spur-of-the-moment move." Lao Bai agreed. In the TV series, a stool was placed underneath the hanging, but the scene where the deceased was murdered was underfoot. There is nothing. Did it fly to the tree out of thin air?

"What about the second?"

"High heel."

"High heels? What do you mean?"

"The crime occurred at the foot of a hill on the mountainside of Wuhua Mountain."

"It takes at least an hour to walk from the foot of the mountain to the mountainside."

"If the murderer was someone who killed people at the bottom of the mountain and dumped the body on the mountain, how could she have walked wearing high heels and carrying the body for so long."

"So I tend to believe that the murderer is a woman who loves to wear high heels. Otherwise, she would not have worn three- to four-centimeter high heels when climbing mountains. The murder should have been a spur-of-the-moment act."

"It is very likely that the murderer and the deceased knew each other, and the two had a temporary conflict due to some conflict."

This analysis by Liu Guodong...

Lao Bai thinks it's quite reliable.

As Liu Guodong said, the footprints left by the other party at the crime scene were typical high-heeled shoes.

It is extremely unlikely that the murderer would kill an unknown person for no reason due to his passion.

So if the other party didn't kill someone in this situation, where was the murderer?
down the mountain?

If it was at the bottom of the mountain, it meant that the other party had to climb the mountain road for more than an hour carrying the body.

Is this possible?
Not to mention being discovered, the other party's physical strength is probably not up to this requirement.

After all, the place where the body was found was close to a walking trail, and there was no way to drive up to that place.

In fact, there are relatively narrow walking paths throughout Wuhua Mountain. You can only walk, not drive.

In addition, the scene where the murderer forged the victim to hang himself was indeed a bit clumsy, and there were flaws that were completely illogical.

Liu Guodong and Lao Bai can make such an analysis, and the action team can also draw similar conclusions.

In the conference room, the action team is discussing the case.

"I think the most important thing right now is to determine the identity of the deceased and conduct an investigation centered on the interpersonal relationships of the deceased."

At the scene of any homicide case, confirming the identity of the deceased is the first priority. With this, the next step can be carried out.

"The murderer deliberately created the scene of suicide. From this point of view, it is very likely that the murderer and the victim knew each other."

"In addition, the current investigation concluded that there were footprints left by high heels at the scene, and the murderer is likely to be a woman."

"And if the other party kills people at the foot of the mountain, it is unlikely that they will go to the mountain to dump the body."

"What does this mean?"

"This shows that the murderer and the victim should have gone hiking together, and there may have been some conflict between them during the trip, and the murderer killed the victim."

"So I think the most important thing now is to determine the identity of the deceased. Once other things are determined, it will be easier."

Fortunately, the test report from the current survey is very beneficial to the advancement of the case.

At 06:30 in the afternoon, the DNA information identification results of the deceased came out.

The victim was a nurse who was reported missing half a month ago.

(End of this chapter)