Early the next morning.
The first case analysis meeting was held in the conference room of the Criminal Investigation Detachment.
Compared with previous murder cases, there are very few clues in this dismemberment case.
However, just because there are few clues does not mean that it is difficult to solve the case.
Some cases seem to have many clues and even directly identify the suspect, but the difficulty of solving the case is not small.
For the police to solve the case, finding the suspect and locking the identity of the other party is one aspect.
Ensuring the integrity of the evidence chain is another aspect.
This complete chain of evidence includes the motive for the murder, the whereabouts of the murder weapon, etc.
Among these, the whereabouts of the crime tools and weapons are particularly important.
In many homicide cases, due to the uncertainty of the crime tools and the unknown whereabouts of the murder weapon, even if the suspect is arrested and brought to justice, even if the other party admits to the murder.
But from the perspective of case investigation, the evidence chain is still incomplete.
During the trial process, there will be hidden dangers for such cases.
In this case, the place where the crime occurred was obviously not the first place where the crime occurred.
“Judging from the current situation, the murderer used a tricycle to transport the body and then burned the body.”
“The purpose is very simple, that is, to destroy the body and eliminate traces, thereby hiding the process of his murder. ”
Zhang Hui first put forward his own suggestions.
From this point of view, everyone still agrees.
The crime scene was in an open area in a valley. It was overgrown with weeds, so it was impossible to identify the footprints left by the murderer.
But the traces left by the tricycle are still relatively clear on some exposed soil.
After the other party killed the person, he transported the body into the mountains and burned it. There should be no major problems in this process.
"And I feel that the distance traveled by the other party to transport the body should be relatively far, unlike the residents living around Beishan."
"The action team did not find anything during the surrounding investigation and visits. The place where the ashes of the body were found , there are no people around, only the rangers who called the police."
Sun Jun has sent people around to start investigating.
As long as there is no large-scale fire in the deep mountains and old forests, it is indeed difficult to find anything burning.
“The ranger who called the police also happened to be passing by this time.”
"Otherwise, if this winter is over and grass grows next year, no one will be able to find anything at all."
The ranger's alarm was indeed a coincidence.
The place where the murderer burned the body was on the route that the rangers took every year to find the forest.
If the murderer staggered by thirty or fifty meters when burning the body.
Maybe even the rangers can’t find it.
Generally speaking, the clues on the action team's side were very limited. Qin Yong turned his attention to Lu Chuan.
Although there were very few ashes left at the scene where the corpse was burned, fortunately, Lu Chuan still had some clues.
Qin Yong’s biggest hope is that Lu Chuan can determine the identity of the deceased through analysis and identification of the remains and ashes.
Only when the identity of the deceased is determined, can the case be further sorted out based on the deceased's interpersonal network.
Lu Chuan turned on the projector and began to introduce the current survey situation.
"Although there are few residues of the ashes from the burning of the skeletons at the scene, some details can still provide us with some clues for solving the case." Lu Chuan switched the projection and displayed an aerial picture of the entire burning scene.
In the past six months, the current survey office has received new equipment, an unmanned aircraft.
When taking photos on site, it is often necessary to take a head-on shot.
But in the past, shooting could only be assisted by some other means.
For a smaller site, there is still no problem if the surveyor directly takes pictures from top to bottom, but for a larger site, there is no way.
With a drone, it is much easier to take photos from above.
“The entire burning mark is irregularly circular, with an average diameter of 0.85 meters.”
“Team Leader Zhang Hui just said that this is not the first crime scene. From the perspective of current investigation, there is evidence to support it.”
“The murderer should have dismembered the body before transporting it, and then added a combustion accelerant after placing the body in a pile at the burning site. Burn.”
"Through the analysis of soil collected from the burning site, it was determined that the accelerant used by the murderer was diesel."
"In addition, we found tire marks from tricycles around the crime scene."
" Yesterday afternoon, Lao Bai and the Operation Team 2 compared the tire marks."
Zhang Hui nodded: "We checked several large tricycle sales malls in Haizhou City."< br>
“Three tricycles were found using tire marks from the site.”
"But the sales volume of tricycles is very large."
"And the time span is long. It is very difficult to find the murderer through the tricycle line."
In fact, Zhang Hui is a little bit wrong. To be conservative, this is not a question of difficulty, but basically impossible.
Judging from the degree of wear and tear, the tire marks found at the crime scene should have been used for one to two years.
But the degree of tire wear is not only related to the time of use, but also to the degree of weathering and the weight of the cargo.
Therefore, in daily life, buying a tricycle that has been used for one year is not necessarily better than buying a tricycle that has been used for three years. In terms of tire wear, the condition of the tricycle must be better than that of the other party.
Generally speaking, in roughly the same outdoor environment, the impact of weathering on tires is minimal, so tire wear is mainly judged by the number of kilometers traveled.
Lu Chuan took Zhang Hui’s words: “Currently, it is relatively certain that we should be able to lock in three brands of tricycles.”
“However, the error may be relatively large in terms of purchase time, so it is not recommended. Follow up on this clue."
"Compared with the analysis of tire marks, the analysis of the skeleton has two clues."
"First, we found two remaining bones in the ashes of the skeleton. The 1.5 centimeter-long one is part of the ball bone of the foot, and the other is a phalange bone. It should be the middle finger, but it is the left foot, right foot, or left hand. It’s still the right hand, I can’t tell anymore.”
Among the remaining bones are fractures of the limbs, which is very good information for solving the case.
For any bone in the limbs, the height information of its owner can be calculated.
However, this time Lu Chuan was unable to give a particularly accurate height range of the deceased.
“The vast majority of normal people’s left and right hands are not the same size, and the size of their left and right feet are also somewhat different.”
With the same height, the left and right hands are not the same size, and the left and right feet are not the same size, so there are certain differences in the calculation equations for calculating height based on the size of the bones of the left and right hands and left and right feet.
Currently, there is no way to determine the left and right directions of the finger bones and foot bones found in the ashes of burned corpses, so we can only make vague calculations.
Of course not all people have their right hand bigger than their left hand, or their right foot bigger than their left foot.
Generally speaking, right-handed people have their right hand larger than their left hand and right foot larger than their left foot, while left-handed people have the exact opposite. (End of this chapter)