Chapter 232: Problems discovered bit by bit
The Haizhou City Criminal Investigation Detachment does not have a sterile laboratory. Let alone Haizhou City, there is no such laboratory in the entire province.
Fortunately, Lu Chuan does not need a sterile environment to cultivate these larvae, and ordinary petri dishes can do the job.
When Shen Yan began to dissect the body, the investigation work of the frontline criminal police was also in progress.
Ren Qiang and a group of people braved heavy rain, starting from the place where the body was found, and moving all the way upstream to trace the place where the body might first appear.
"Several surrounding police stations have already checked it out, and there have been no new missing cases recently."
When an unnamed body is found, the first thing the criminal police investigate is usually the local missing persons.
Based on the degree of decomposition of the body, the time of death of the deceased can be initially estimated to be about a month.
Zhang Hui focused on investigating the missing persons information during this period.
Comparing gender, height, clothing, etc., there is no similar information.
"Start with the clothes on the deceased."
Qin Yong has obtained preliminary findings on the clothes on the corpse.
“There is a clear difference between the size of the deceased’s underwear and the figure of the deceased, and this brand of underwear is relatively expensive. There should not be many stores selling this kind of underwear in Haizhou City. Let’s check and see if we can find anything.”< br>
The clue is not big, but it is possible to obtain further discoveries through this.
After all, there shouldn’t be many people who can afford more than a thousand bras.
"How can the salvage team say that?"
After discovering the body, Ren Qiang immediately contacted the salvage team that he usually cooperates with.
"Lao Wu sent people to test the water. The water level in the river has skyrocketed. The hydrological conditions below are very complicated. In addition, it is still raining. They expect that they will not find anything even if they go into the water."
Wu Jingzhong is an expert in underwater salvage and has cooperated with the criminal investigation detachment for many years. He said that it would be difficult to find it.
Qin Yong thought for a moment and shook his head: "No, after the rain stops, we still have to let Lao Wu and the others go into the water."
"The deceased obviously rushed down from the upstream, and one of his shoes was missing. There may be other things along with the body."
"If it doesn't work, expand the search scope."
< br>Ren Qiang nodded, this is a strategic decision, and only Qin Yong in the detachment can make the decision.
“Okay, I’ll call him after the meeting. The weather forecast says that the rain will stop early tomorrow morning. By then, the hydrological environment should be less complicated and it will be safer to go into the water.”
“ In addition, Liu Guodong just called and the sharp knife found in the black plastic bag at the scene was confirmed to be the murder weapon.”
Yang Sen and Lao Bai had already extracted blood stains with the same blood type as the corpse on the sharp knife.
Although the body was severely decomposed and the wound could no longer be compared with the scar from a sharp knife, the blood type was the same and it was also a stab wound with a sharp weapon.
In addition, the location where the two were found is similar, which can support the judgment that the sharp knife is the murder weapon.
“Are there any fingerprints?”
To solve a murder case, you must know several important factors.
First, the identity of the deceased, second, the cause and time of death, and third, the murder weapon.
Now, the second and third factors have been found, leaving only the first one.
"There are no fingerprints. Lu Chuan has already checked it. The handle of the knife has been carefully wiped and there are no traces left."
"But there is a problem that is not very logical."< br>
“What’s the problem?”
Ren Qiang stood up and drew two parallel lines on the whiteboard.
"This is the location where the body was found, just on the bank of Bailan River. The body was lying on the bank with its back facing up."
Ren Qiang drew another straight line: "This is where Yang Sen found The location of the murder weapon was measured to be more than 50 meters away from the corpse, 53.8 meters to be exact. "The blood stains of the same blood type as those of the corpse were found on the sharp knife, and the wound on the corpse's chest was also caused by a sharp weapon."
“Based on the current information, it can basically be determined that this is the murder weapon.”
Ren Qiang paused and pointed to the straight line he drew: "But the problem is that the black plastic bag containing the dagger was found more than fifty meters away from the body."
"So, how did the murder weapon get to this location? "?"
"River water?"
Ren Qiang shook his head: "The overflow of the Bailan River where the body was found has invaded the land as far as twenty meters."
“In other words, the plastic bag containing the murder weapon could not have been washed away by the river.”
"Then where did this murder weapon come from?"
"Also," Ren Qiang picked up a photo: "This is the appraisal report made by the current survey."
"Sharp Knife There was originally not enough blood stains for detection, but Yang Sen extracted enough blood stains from the inside of the scabbard."
"Combined with the fact that the fingerprints on the handle were deliberately erased, it shows that the other party was actually handling the knife. When removing the handle, the blade was also wiped."
"The reason why there are still blood stains is because there is no way to remove the blood stains inside the scabbard, or the murderer forgot to remove it."
This is easy to understand.
After the murderer finished killing the person, he put the sharp knife back into the scabbard and wiped it before discarding it.
But there were still blood stains left in the scabbard.
“What do you think?”
Of course Qin Yong understood what Ren Qiang meant.
But what exactly does this mean?
The body floated along the river, but the murder weapon was thrown away?
“I think there are two possibilities.”
“First, the murder weapon was abandoned by the murderer. After the murder, the body was left to rot. After the murder weapon was taken away from the scene, it was abandoned. "The body was accidentally washed into the river due to heavy rain recently, and then washed up on the shore exactly where the murderer abandoned the murder weapon."
"You mean there was a murder weapon first, and then the body accidentally washed over?"
"Yes, the murderer may have discarded the murder weapon at will, and the body was washed over by the Bailan River due to heavy rain."
"What about the second possibility?"
"The second possibility..."
Ren Qiang thought for a while and shook his head: "The murderer deliberately left the murder weapon on the body. Nearby, want to provoke us? ”
"Provocation?"
Qin Yong has been handling cases for so many years and has seen all kinds of murderers.
There are indeed some self-righteous murderers who think they are very smart and cautious, deliberately leaving some clues and playing a hide-and-seek game with the police.
"Yes, it was provocation. After he killed the person, he left the body to rot. After he found the body washed away by the river, he followed him all the way, and then left the murder weapon at the scene."
"Of course. , there is a time difference. When the other party abandoned the murder weapon, it was before the flood control patrol arrived."
"Let us know what you think."
"Although the first option is a bit too coincidental, it does not mean it is impossible. The second option... what is the point of him provoking the police?"
"Yes, I agree with Lao Song's view. Most of the general provocative behaviors are found in serial cases."
"You haven't encountered one or two in so many years, right?"< br>
(End of this chapter)