Existing exploration laboratory.
Shen Yan is visiting the fruits of Lu Chuan's labor in the past six days.
"Is this what you cultivated?"
In the current exploration laboratory, there are already more than fifty petri dishes on the table.
Some of them seemed empty, with nothing in them.
Some are filled with flying linens, and others are crawling with linex larvae.
Lu Chuan nodded: "There is still one experiment that has not been completed, and the results should be available tomorrow morning."
"only……"
"What's wrong?"
Although Shen Yan is a forensic doctor, she has also learned the basic theories of forensic entomology.
But this is the first time that Lu Chuan has used petri dishes to cultivate Sarcophagus larvae.
Lu Chuan shook his head: "Through this cultivation of lineage fly larvae, we can more accurately determine the time when the first batch of lineage flies parasitized on the corpse."
"However, judging from the current results, some of them are not consistent with common sense. These eggs seem to have taken too long to hatch, as if..."
Lu Chuan opened one of the petri dishes and found a pupa inside, which was a larva about to hatch.
"It looks like it has been refrigerated for a while!"
Lu Chuan discovered a strange phenomenon while cultivating hemp larvae.
The intergenerational relationship of these Sarcophagus larvae is very simple, they are all larvae of one generation.
In other words, the sarcophagus larvae parasitized on the corpse did not hatch and then lay eggs.
Here comes a problem.
Lu Chuan collected DNA information from the collected Sarcophylla larvae.
It was found that some sarcoid fly larvae have homologous DNA, that is, eggs laid by the same sarcoid fly.
However, the development of these lineflies is not the same. Some grow large and some grow small.
This is not a common occurrence among cadaver parasites.
Unless it is under sealed conditions, the body will be found by flies within ten minutes of death.
In other words, the time for flies to lay eggs and the time for corpses to die can be considered almost equal.
This is an important reason why forensic entomology exists.
However, the growth and development gap between the homologous larvae found in this corpse was very large.
The first batch that Lu Chuan cultivated had pupated and turned into lineflies two days ago.
But the small larvae are now just over one centimeter, and they are still about a week away from pupating.
Lu Chuan is now waiting for an intermediate result so that the accurate time can be determined.
Just a few pupating larvae, and a lot of important information can be calculated based on the time they pupate.
Shen Yan didn't know much about this aspect. She only knew some basic theoretical knowledge.
"I heard from my master that things are not going well with Team Leaders Ren Qiang and Sun Jun?"
Lu Chuan nodded, he also heard about it.
"Brother Hui and the others found the first scene where the murderer dumped his body early the next morning after the incident, and I went to do an on-the-spot investigation."
"But there were very few traces left at the scene. The heavy rain washed away everything and destroyed everything. We only found signs that the body had been dragged, and a shoe was left at the scene."
"Some of the hair we collected was confirmed to belong to the deceased, but there were no other major findings."
"Team Leader Sun Jun also conducted a detailed investigation based on the fact that you found that the size of the clothes worn by the deceased did not match his body shape."
"They are currently holding a case analysis meeting and should be reporting on the situation."
"But I heard from Team Leader Sun this morning that the situation is not very optimistic."
Lu Chuan and Shen Yan came early in the morning.
I met Sun Jun on the way to the office and chatted for a while, but didn't ask for any specific details.
All I know is that there were difficulties in finding the expensive underwear on the body.
meeting room.
"Can you contact the headquarters of this underwear company and check where to buy it nationwide?
Consumer information for underwear? "
Now that Haizhou City has determined that there is no problem with people buying bras of this style and size, it will start nationwide.
Since only thirteen pieces were sold in the entire Haizhou City, it is estimated that the number nationwide will not be particularly large.
Moreover, this luxury store does not have sales outlets in all cities.
It shouldn't be particularly difficult to check.
"Let me try. This company's headquarters is not in Haizhou. I'll contact the criminal investigation team there to see if I can help."
Sun Jun has actually thought about this method, but he is not sure whether it can work.
But it's hard to say whether it can be found. After all, the sales of this underwear are not under real names.
The reason why the Haizhou City Criminal Investigation Detachment conducted such a thorough investigation is because this territory is Haizhou.
But even so, it took a week to figure it out.
And if this scope is expanded to the whole country...
Sun Jun had no confidence at all.
They had had similar experiences before, but without exception they had failed.
Qin Yong actually knew this situation.
He came from the front line, and the cases he handled also encountered similar situations where the scope of investigation needed to be expanded.
But there are very few successful ones, but you can’t stop checking just because the success rate is low.
Of all the clues now, this one is the most obvious, so I can only pursue it.
Of course, the investigation by Sun Jun and others cannot determine who the murderer is just based on a bra.
After all, even if we find all the people who bought this D-cup bra, we can't say who is the murderer if his bra is lost.
Otherwise, Sun Jun would not have had to search Haizhou for a week with more than 20 people.
The meeting ended quickly.
The current survey office.
"How's it going? What's the progress?"
Lao Bai handed Liu Guodong a cup of hot tea and asked about the situation of the case analysis meeting just now.
Liu Guodong shook his head.
"Ren Qiang has already checked the surrounding villages. There are no missing persons and there are no witnesses. The place where the murderer dumped the body is so remote that there are no people fishing."
Lao Bai still has some experience with this.
A place where fishermen don’t go is definitely considered an inaccessible place.
"What about Sun Jun?"
"Nothing came of it. The thirteen people who bought the D-cup bra in Haizhou City all investigated it and found nothing."
"Old Qin is going to attack the whole country to see if he can find any clues about the bra."
Nationwide?
Lao Bai shook his head when he heard this.
After so many years, the nationwide investigation can only be said.
One human life does not require the use of the country’s resources.
Moreover, the bra was inspected here.
There are no specific substances on it, no hair or anything like that.
Some scraps of skin also belonged to the deceased.
"If you ask me, we have to start from the surrounding areas. The murderer can't leave the body silently. Even though it is farther away, there won't really be no one at all?"
Yang Sen thinks it’s better to start from the scene.
"It's not like you haven't been to the scene before. No one lives in the surrounding area. Ren Qiang and the others have been checking for almost a week, but there's nothing there?"
