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 did not need a sterile environment to cultivate these larvae, and ordinary petri dishes were sufficient.
When Shen Yan began to dissect the body, the investigation work of the frontline criminal police was also in progress.
Ren Qiang and his team braved the 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 police stations around have been informed about it, and there have been no new disappearances recently."
When an unknown body is found, the first thing 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 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 corpse's clothing.
"There is a clear difference between the size of the deceased's underwear and the figure of the deceased. Moreover, this brand of underwear is relatively expensive. There should not be many stores selling this type of underwear in Haizhou City. Let's check and see if we can find anything."
The clues are not big, but it is possible to get 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. Plus it's still raining. They don't expect to 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 had obviously washed down from upstream, and one of his shoes was missing. There was probably something else that came down with the body."
"If that doesn't work, expand the search scope."
Ren Qiang nodded, this was a strategic decision, and only Qin Yong in the detachment could make the decision.
"Okay, I'll call him after the meeting. The weather forecast says that the rain will stop early tomorrow morning. The hydrological environment should be less complicated by then, 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 have extracted blood stains with the same blood type as the corpse on the sharp knife.
Although the wound could no longer be compared with a sharp knife due to the severe decomposition of the body, 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. Read the book
"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 that the second and third factors have been found, only the first remains.
"There are no fingerprints. Lu Chuan has already checked it. The handle of the knife has been wiped carefully, leaving no trace."
"But there is a question that is not very logical."
"what is the problem?"
Ren Qiang stood up and drew two parallel lines on the whiteboard.
"This is the location where the body was found, on the bank of the Bailan River. The body was lying on the bank with its back facing up."
Ren Qiang drew another straight line: "This is the location where Yang Sen found the murder weapon. It was measured to be more than fifty meters away from the body, fifty-three point eight meters to be exact."
"Blood stains of the same blood type as those of the rotten corpse were found on the sharp knife. The wounds on the corpse's chest were also caused by sharp weapons."
"Based on the current information, it can basically be determined that this is the murder weapon."
Ren Qiang paused and pointed
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 wash?"
Ren Qiang shook his head: "The Bailan River section where the body was found, all the overflowing river water invaded the land up to twenty meters away."
"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."
"There was originally not enough blood stains on the sharp knife for testing. 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 actually wiped the blade when handling the handle."
"The reason why there are still blood stains is because there is nothing that can be done about 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 its sheath 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 where we found it."
"Due to heavy rain recently, the body was accidentally washed into the river, and then washed up on the shore exactly where the murderer abandoned the murder weapon."
"You mean there was the murder weapon first, and then the body rushed over unexpectedly?"
"Yes, the murderer may have discarded the murder weapon carelessly, and the body was washed away by the Bailan River due to heavy rain."
"What about the second possibility?"
"The second kind..."
Ren Qiang thought for a while and shook his head: "The murderer deliberately left the murder weapon near the body to provoke us?"
"provocative?"
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 a 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."
"If you have any ideas, please tell me."
"Although the first one is a bit too coincidental, it doesn't mean it's impossible. The second one...what's the point of him provoking the police?"
"Yes, I agree with Lao Song's view. Most provocative behaviors are found in serial cases."
"In all these years, you haven't encountered one or two, right?"
