Midday.

Conference Room No. 1 of the Criminal Investigation Detachment.

"Brother Qiang, there's a clue!"

Zhang Hui's mood was high, and his expression was excited: "Tanaka Fa and the Wang family do have friction and disputes."

"Things started five years ago......

Zhang Hui summarized and analyzed the information he had heard.

"Five years ago, the vineyards in Beitun Village were re-divided into contracted areas to measure the size of the land, and because of mobile farming, the vineyards adjacent to the Wang family and the Tian family had half more ridges."

"The two families had a dispute because of this half of the ridge, and Tanakafa and Wang Chengshun, Wang Zihao's father, fought."

"Back then, it was the village party secretary who adjusted, and Wang Chengshun compensated Tanaka for 2,000 yuan in medical expenses."

"But at that time, half of the ridge that had a disagreement was never resolved, and the two families planted it in turn, one for a year."

"Last year, the daughter-in-law of the Wang family did not plant in the field after taking turns planting."

"Although the relationship between the two families looks good, it is actually almost the same."

"In addition, Tanaka's family lives in the west of the village, if he captures Wang Zihan, he can go home directly, and it will be difficult for other people in the village to find out."

"Another thing, I heard from Tanaka's neighbors that Tanaka used to wear an old blue overalls, and he only changed into new clothes three days ago, the day after the child disappeared."

Clothes, neighborhood conflicts, with these articles, Tanaka's suspicion has increased greatly.

"Brother Qiang, can you catch it?"

"What are you hesitating about, catch!"

Interrogation room.

Tanaka, dressed in new blue overalls, sat in the interrogation chair and said nothing.

"Tanaka, do you know this dress?"

After arresting Tanaka, Zhang Hui conducted a careful search of Tanaka's home.

In the wing room where Tanaka's daughter-in-law was locked, a red scarf was found.

In the bedroom cabinet, an old blue overalls were found.

Upon closer inspection, hair and dander were found on it.

Lu Chuan is doing DNA identification and analysis, if these hairs and dander have Wang Zihan's, it means that Tanaka is indeed the murderer.

What's more, there is also the red scarf found in the wing.

"Tanaka, the red scarf found in your wing is being examined, and hair and dander have been found on the old clothes you have changed."

"I hope you can explain it clearly before the results come out, and this can be regarded as a confession and voluntary explanation."

"When the result comes out, even if you don't say anything, you can still be condemned!"

"I...... I said......"

Tanaka's hands trembled, and he choked up and began to confess: "I ...... that day I did catch the child."

"But...... It was an accident to kill him......

In the face of the police's questioning, sitting in the spotlight, a farmer in the field, where can he bear it.

After a while, everything was said.

It turned out that Tanaka sent Wang Zihan to arrest him so that the Wang family would return half of the ridge to him.

"That land was originally my family's, and Wang Chengshun's daughter-in-law had to occupy the past.

"The family planted for a year, but after his family planted last year, when the field was ploughed today, he was buried in the grape trellis again......

"I didn't really want to kill the children, I just wanted to scare them...... Woo woo ......"

"The kid...... I also watched grow up......

"Why did the kid die again?"

"Yes...... Be...... My daughter-in-law ......

"That day, after I caught Wang Zihan, tied him up and gagged him, and locked him in my wing, because I was afraid that others would find out, so I went out to work."

"But I didn't expect that when I came back in the afternoon, the child died, and half of my daughter-in-law's ear was bitten off......

"I really didn't mean to, I was in a hurry to go out in the morning, so I didn't feed her......

"Throw the corpse

？」

"In the middle of the night, I went to dump the corpse and threw it in the No. 3 machine shaft......

The interrogation here is not over yet, and the appraisal results on Lu Chuan's side have already come out.

The red scarf has traces of blood on Wang Zihan's ear after being bitten, and the blood type is the same as Wang Zihan's blood type.

The shabby blue overalls found in Tanaka's fortune cabinet have thin silk threads scattered around the cuffs, and the fiber filaments found at the scene should be left behind on the cuffs.

The dander on his body is from Tanaka, his daughter-in-law, and Wang Zihan.

"Ding!"

"Advanced mission completed: the host and colleagues worked together to determine the first scene of the crime, found the key clues to lock the scope of the suspect, and successfully helped the task force to lock the suspect through experimental analysis of the fiber."

"System Reward: Forensic Entomology Intermediate Skill Card, please select the skill type of the host."

Forensic entomology?

When Lu Chuan was chatting with Shen Yan, he heard her talk about this branch of forensics.

This is a subcategory that has been relatively understudied in the field of forensics.

Forensic entomology is a comprehensive discipline, which mainly analyzes the time of death, the cause of death, the place of death and other information according to the growth of corpse-eating flies, beetles and other insects on the corpse.

Under the forensic entomology catalogue within the system, there is a more detailed division of capabilities.

For example, in the intermediate ability, there is an intermediate large-headed goldfly breeding skill card, and an intermediate mercerized green fly identification and analysis skill card.

There are also intermediate maggot growth identification and analysis skill cards, intermediate white-bellied beetle trait analysis skill cards and so on.

In forensic practice, the analysis of insects or eggs parasitic on corpses can provide a lot of information to forensic medicine.

Especially on highly decomposed corpses, where a lot of corpse surface information is missing, the analysis of corpse parasites can help the criminal police grasp more clues to solve the case.

There are a wide variety of skills, Lu Chuan has to choose well.

You can't choose a skill to breed corpse flies, and that's a big loss.

In the end, Lu Chuan decided to choose the intermediate cadaver egg identification and analysis skill card.

Intermediate cadaver egg identification and analysis skills can accurately identify the type and growth degree of parasitic eggs in corpses.

After the death of a corpse, the resulting odor is able to attract a variety of insects.

These include flies, beetles, bees, butterflies or moths, and the first to be attracted to a dead body is a fly.

In particular, the green-headed fly and the hemp fly, two types of flies can find the corpse and lay eggs ten minutes after the murder.

The most important role of cadaveric entomology, or the most used in practice, is to determine the time of death of a cadaver.

And most of the judgment of this time is by collecting the eggs on the corpse and hatching them.

Each type of egg hatches at a fixed time in different environments.

By simulating the temperature and humidity of the environment at the crime scene, and hatching the eggs, the specific time when the insects lay eggs in the corpse can be obtained.

By making the difference between the standard incubation time and the actual incubation time of the eggs, the specific time of the corpse's death can be obtained.

Lu Chuan's intermediate corpse egg identification and analysis skills can directly judge the type and growth degree of eggs, which is equivalent to directly judging the growth time of eggs.

This is of great significance for judging the time of death.