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

Chapter 238
He opened the drawer and took out a red plum worth five yuan. Lao Bai threw it to Yang Sen and expressed different opinions at the same time.

Lu Chuan actually didn't know that when he was away, the three of Liu Guodong basically didn't smoke the Huazi he put on the desk.

Unless there are people from other offices coming.

For the rest of the time, they would either smoke Hongmei or Honghe.

As a newcomer in the current survey office, Lu Chuan took the initiative to spread cigarettes and invite everyone to smoke expensive cigarettes, and no one objected.

When they went to work, they came here in the same way, except that unlike Lu Chuan, they still couldn't afford Huazi at that time, and they smoked Camel cigarettes for Master.

Yang Sen gave Lao Bai a blank stare indifferently.

He took Laobai's cigarette, lit it, and coughed.

"This smoke is stronger than Huazi."

"Nonsense, how much is this?"

Lao Bai still doesn't know that Hongmei is stronger than Huazi and can scratch his throat, but it's cheap.

Yang Sen nodded, not only because he felt that what Lao Bai said about cigarettes was correct, but also because he felt that his judgment about the case was correct, and the probability of something happening at the scene was the greatest.

A case occurs, and every office is actually discussing the case.

The current investigation office is actually fine, after all, it is a technical background. Although it has not been on the front line to handle cases these years, all reasoning and guessing are based on the findings of the current investigation.

Not necessarily in other offices.

Civilian police gossip more.

"I remember it was a love killing. I heard that the underwear on the corpse cost more than 1000!"

"Not necessarily, the coat of the corpse is only a few tens of dollars, and it may have everything."

"Group leader Sun has a dark face today, so he probably won't gain anything."

"Hey, the case has been going on for a week, and I heard from Brother Hui that there is still no major progress..."

The police are human beings too. Civilian police officers who are engaged in internal affairs also like to gossip when they go to work.

However, due to the limitations of the police industry itself, or the characteristics of the work, gossip is also a case of gossip.

It's just that there are specialties in the art industry, and the first-line investigation has to be an action team.

Most of the time, whatever they can think of, the action team will not let it go.

Soon, the day without any gains passed.

During the two or three days after the case happened, everyone was still very nervous and very busy.

But a week passed, there was no progress in the case, and everyone performed their duties and began to deal with other tasks at hand.

Except for Lu Chuan who is busy in the current investigation office, no one else has any important work at hand. The workload of this investigation is relatively small.

Of course, what Lu Chuan was busy with was not the current survey work.

In the past few days, everyone knew that Lu Chuan was actually raising bugs in the laboratory that was being surveyed.

Many people took the time to come over to have a look.

Of course, he was full of enthusiasm when he came, and his face was pale when he left.

This is not to blame for Lu Chuan, this group of people come to see the maggots when they have nothing to do, they are sick.

What's more, most of the people who came to see it were the internal police.

Haven't been out at the scene, let alone watching maggots?
Lu Chuan remembered that there were still two police officers in the office, and they seemed to vomit when they went out.

From this point of view, Shen Forensic has a natural advantage.

After all, forensic doctor Shen is the only policeman in the criminal investigation team who can discuss maggot breeding with Lu Chuan while drinking coffee.

Early the next morning, Lu Chuan went straight to the field survey laboratory in the basement without tidying up the office as soon as he went to work.

Today is the day when the intermediate larva he cultivated emerges.

Combining the time of the larvae of the flax flies that have emerged in the early stage, and the larval stage that is growing, Lu Chuan can judge the time when these larvae parasitized on the corpse.

That is, it is more accurate to lock the time of death of the victim.

Lu Chuan arranged more than fifty petri dishes in a row in order.

Record the growth status and eclosion time of different sizes of larvae of the sargassum fly in the petri dish one by one.

The optimum cultivation temperature for the larvae of the hemp fly is between 24°C and 28°C, and the relative humidity is between 60.00% and 80.00%.

Fourteen hours of light per day can hatch in about a week.

When the external temperature and relative humidity do not meet the requirements for hatching, the eggs of the hemp fly can enter a dormant state.

Even in a low temperature state, it can be stored for a week or even longer.

But the lowest temperature cannot be directly exposed to minus ten degrees.

According to the experiments conducted by Lu Chuan, the results showed that the larvae of the hemp fly with the longest growth period on the corpse were 36 days!

36 days, the entire life cycle of a general hemp fly is about one or two months.

That's why Lu Chuan judged that the eggs had been frozen.

Lu Chuan collected humidity data at the first scene where the murderer dumped his body, combined with recent temperature changes, and restored the external environment at that time.

If the murderer dumped the body immediately after the killing, it would take eleven days for the eggs of the scorpion fly to hatch.

But the actual situation is that the hatching time of the eggs is 36 days.

With this conclusion, Lu Chuan can draw a definite conclusion.

After the victim died, the murderer did not abandon the body immediately.

The body was thrown out eleven days ago, and the victim died 36 days ago!
Surveying the office now.

Liu Guodong looked solemn.

"Are you sure the body was refrigerated?"

Lu Chuan nodded affirmatively: "If it hadn't been refrigerated, it would be impossible for the hemp fly eggs parasitic on the corpse to have a 36-day incubation period."

"But, if the corpse was refrigerated, wouldn't the eggs freeze to death?"

"Cryogenic refrigeration, even sub-zero low temperature refrigeration, is not freezing."

"This is also the reason why the forensic doctor did not find freezing during the autopsy."

Low-temperature refrigeration is actually what is often said in life to keep fresh.

The preservation time is generally not too long, but because it is not completely frozen, basically there will be no traces.

What's more, the corpse was already highly corrupted when it was discovered.

Qin Yong's office.

"Do you suspect that the body has been refrigerated?"

Liu Guodong nodded: "It is possible."

Pass the analysis report of Lu Chuan's corpse parasite eggs to Qin Yong, Liu Guodong explained.

"This is Lu Chuan's forensic entomological analysis report based on the parasitic sargassum flies eggs on the corpse."

Although Qin Yong has been a criminal police officer for a long time, this is the first time he has seen this thing.

"The hatching time of the hemp fly eggs is generally one to two weeks."

"According to the temperature, humidity and other conditions at the first site where the body was dumped, it is estimated that the hatching time of the eggs should be eleven days."

"In order to verify the calculation, Lu Chuan has done several experiments this week, and there is a high probability that there is no problem."

"However, the egg on the actual corpse has the longest incubation period of 36 days!"

"It is only possible to achieve such a long incubation time under the condition of low temperature refrigeration, that is, when the eggs are dormant."

"36 days...so accurate?"

(End of this chapter)