How to identify fake crime scene

Camouflage crime scene refers to the crime scene, the perpetrator by deliberately changing the direction of the investigation scene evidence to mislead the police. Crime scene contains a lot of information that could be used to identify the site camouflage, but even seasoned investigators may also ignore these messages. There is no doubt that in many cases there are field camouflage, disguise the actual number is far more than camouflage field site has been found. However, the evidence can change the dynamic changes, blurred or eliminate evidence, and the evidence does not lead to be identified. In order to camouflage the crime scene or other evidence to identify the dynamic changes of scene reconstruction need to bloodstains, clothes, hair, body posture, bullet ballistics and other evidence of the relationship between observed carefully. Reconstruction shall have the evidence of these relationships explain the knowledge, skills and abilities.
        In order to identify the presence of camouflage crime scene reconstruction we need to look for evidence of what types? Under normal circumstances, we must look for evidence that the overall situation and the field reflected or reflected inconsistent behavior. In some cases, there is a logical process may only evidence of a particular event or series of events does not match, or logical processes is missing with a particular event or series of events of a certain evidence do not match. In other cases, the camouflage field behavior may get a lot of conflicting evidence interrelated confirmed. Each case has its own unique, therefore, must be careful scrutiny.

        Discussion of the following topics to help rebuild camouflage field personnel to deal with the problem properly, of course, these topics can not do everything. These questions are intended to further stimulate the imagination to rebuild staff, and guide them to continue to explore new areas. These problems have not exhausted all the possibilities.

    Site entrance

        In many other factors involved disguise site, the most common is open or broken windows. Personnel engaged in the work of crime scene simulation believe that this situation gives rise to the impression that the perpetrator may enter the crime scene from that location. Therefore, for the reconstruction of staff, checking the crime scene entrance and exit is vital. The following guidelines may be helpful for the reconstruction has a lot of personnel: determining the crime scene of all imports and exports (door, windows, passageways, roads, etc.); determining the time the crime occurred in these locations can access (for example, some of the windows and doors may blocked or permanently closed, some windows may be high, ordinary people difficult to pass); by recording the transfer of the evidence (blood, fingerprints, broken glass, falling objects, etc.) on the crime scene and reverse Transfer evidence (lack footprint in the dust outside the window, the lack of any signs of violence, burglary, etc.) to determine whether these sites associated with criminal activity; import and export of the crime scene to determine whether the possible manifestations of criminal behavior and consistent with, for example, From the outside use violent means to enter the scene, took the valuables, as well as evidence of the existence of the necessary transfer --- which may be needed by the corresponding experimental reconstruction personnel.

        Since the crime scene evidence Importers position must have been changed or transferred, therefore, to determine whether there is sufficient evidence to prove the perpetrator out of the crime scene as expected, which is usually a crime scene to determine whether there is the most decisive feature camouflage . Many live in disguise homicides are related killings in the victim home burglary implemented. Unknown perpetrator needs to enter the crime scene, they have to leave the crime scene. By analyzing the positions on the characteristics of the crime scene, for example, a double-locked door latch, or dust on the surface unharmed windows, you can rule out other possibilities, and to determine the presence of camouflage crime scene.

    Located in the crime scene or taken away from the crime scene weapon

        For all the weapons found at the crime scene, we need to focus on the following issues: whether weapons found around the victim that led to the damage of weapons? If the answer is no, then, that the reasons for the weapon at a crime scene? Are there other weapons on the crime scene? Whether the weapons are used for a specific purpose?

        In some cases there is evidence that someone had used the weapon at the crime scene, but failed to find any weapons at the crime scene. For each crime scene, investigators must find out whether there is evidence that someone had taken the weapon from the crime scene. If you can prove it, we need to continue to identify the person to take away weapons for what purpose? If the answer to the first question is no, then there is no need to answer the second question.

    Firearms

        Many types of firearms are the weapons most likely to appear on the camouflage crime scene. In view of this, reconstruction must be careful to answer some fundamental questions associated with all types of firearms in order to determine the association between firearms and criminal behavior.

        First, whether the wounds of victims with their statements is consistent with the case? In the suicides, the victims of their own ability to pull the trigger? Secondly, we need to identify the firearm correctly filled bullets are consistent with the evidence and testimony of witnesses site? Another issue to note is that in the crime scene found firearms is flawed? The ability to install multiple firearms, bullets and fired bullets?

        These questions will help determine the specific firearms involved in a particular case. In those cases involving firearms, and not only those cases involving disguise the crime scene, the reconstruction must accurately answer the question in each case.

    Gunpowder deposits

        Components include components of gunpowder deposits of carbon, soot, unburned gunpowder and shot residue. Burning gunpowder from the barrel (as well as other locations, depending on the design configuration of firearms) the discharge, and is formed in contact with the skin burned gunpowder traces of gunpowder deposits which should be consistent with the proposed formation of the way.

        Many suicides are contact or near contact gunshot gunshot due. In this case, the distribution of gunpowder must be consistent with the situation caused by the gunman. If you failed to find gunpowder, to show that intermediate shooting distance or there is an obstacle.

        Gunpowder firearms emitted can fly from firearms firing position to the outside by three feet away from the victim wound site. Forensic pathologist must examine traces of bullets in order to determine whether there is gunpowder particles. However, if there is only one powder particles, the powder particles can not serve as sufficient evidence of close shots, because bullets could have been fired powder particles adhere to the lubricating oil, the powder particles may accompany the bullets fly some distance.

        In order to extract the victim hand shot residue, firearms need in the vicinity of the victim hand position transmitter, if close enough, it will form gunpowder deposits, and may even form gunpowder burn marks. This powder form deposits may be held and the way firearms are not consistent. In other words, because the hands of the possession of firearms, gunpowder deposits will lead to a blank intermittent phenomenon, which is usually clear. If these forms abnormal, it may indicate the presence of camouflage field.

    Moving body

        That the victim's body was transferred to a second site or "postmortem scene" disguise the crime scene is not very common. Under normal circumstances, the perpetrator is in a position camouflage body lying on the ground crime scene, which even may just be due to the body fell to the specific location, thereby causing inconvenience to move the bodies. Specific circumstances may include: Unable to move the bodies before the bodies could be found, or can not be completely cleaned the crime scene. To determine the specific cause, reconstruction must carefully check the crime scene and circumstances of each case, in order to effectively solve this problem. In each crime scene, the specific test results will depend on the interaction between the victim and the victim of the environment, as well as the transfer of the evidence expected to be present.

        Factors to be considered include reconstruction staff (of course not limited to): on the ground and surrounding objects (including folded carpets, heel towing mud, blood extending from another room over, etc.) present on the surface of the boxes to trace evidence and towing stain evidence; on the victim's body had been folded or rolled up clothes; inconsistent with the corpse pose showing last Shiban (blood deposition direction opposite to the gravity); inconsistent with the corpse pose showing last rigor mortis ( joint stiffness state against gravity); blood should not be in a position originally they found blood evidence; trace substances in the body and the crime scene found no association.

    Clothes

        Whether the victim's clothes were torn to or volume to a particular direction? If someone was shuffling travel, lifting his shirt will be upward, clothes twisted worst position is the body in contact with the ground position. If someone dragged begin traveling, he will be dragged to the bottom of the pants, shirts will be stretched very tight, your feet will exhibit outwardly extended state. At the same time, his hands may be put into a "normal" position.

        We also need to focus on rebuilding the following: whether the victim's clothes off people have been or are away from the crime scene? This is the purpose? Whether the victim's pockets had been turning over? Are these pockets are dug even torn bad? Whether the victim's body had been rolling, so that clothes showing an uneven condition? Whether there stain marks on the victim's clothes, indicating that the victim's body had been dragged to travel (soil, vegetation, water, etc.)? Clothes victim is abnormal place? Are the clothes inside out what items or if there is any items into the clothes inside? Whether the crime scene looks as if the victim after the attack had been rearranged through clothes? If this is the case, then why the victim's clothes are off initially, why take the trouble to re-perpetrator to the victim wearable clothes, perpetrators want to achieve what purpose?

        Reconstruction need by conducting tests to determine why the victim's clothes when showing a state crime.

    Shoe

        In a car accident, there may be the sole victim of parallel scratches, which indicate the direction and position of the body and standing at the feet of victims which were damaged. If the victim is not the sole presence of such scratches, then, or show very low speed when the accident occurred, or show the bodies of the dead bodies to be here.

        Reconstruction workers should be concerned about the following matters: the victim's shoes matches the feet? Shoes above the victim and the crime scene of the existence of the transfer of the evidence is inconsistent? Was a crime against the victim in the process is wearing shoes? Alternatively, the characteristics (blood, injury or transfer of evidence at the crime scene, such as soil or gravel) indicate whether the victim feet at the bottom of the shoes may have been off? Victims of the shoelace knot located?

        People in their own shoes, usually bent and laces in the shoes of the middle line, or lift one leg on the other leg above, then tied the laces, then, the shoelace knot is located leg inside. When a mother to his children shoes, may also tie shoelaces, this time, the knot will shoelace located outside of the leg. When the perpetrator to the victim shoes, it is easy to make such mistakes.

    Bloodstain

        Blood can record the wounded bleeding related behavior had occurred. The universal law of blood is needed to follow the laws of gravity. Blood generally vertically downward movement, only under the action of other external forces will turn in the other direction. Again, blood generally downward vertical movement, not horizontally.

        First, consider the location of the bodies and the laws of gravity which, if in fact the blood on the crime scene ought to be moving along the direction? Second, the blood is suspect and the victim and the alleged behavior consistent?

    Hair

        Hair location is a generally neglected clues. Hair victim usually reflects why the victim will show the incident demonstrated posture. In this case, the victim's body with long hair has been particularly evident, but not limited to the case of long hair, because short hair may also show the status of the movement.

        When someone is pushed travels, her hair will extend to her direction of travel. If someone's hair is lifted and was put down first, then her hair would be showing a "high roll" (a pro-woman hair comb high) mode.

        In fact, if someone was towing a travel arm, it will only have one side of the hair showed that "high roll" mode. When a person with long hair backward on his back ground, her hair will be scattered spread out from the head, showing a general distribution ring. If a person with long hair backward prone ground, her hair will start to spread from the head, and the hair is not located below the face.

        Hair also follow the laws of gravity, the hair is usually drawn showing the status, role unless by the force. Before the death of the victim suffered damage may lead to hair due to the solidification and sticky blood on the side of the head. Dried blood may also show the movement patterns of the hair on the plane. Hair can exhibit very clear stripe pattern. In discussing all these clues, we must understand how the bodies of the victims of bending and movement, and we must also bear in mind the effect of gravity.

    Text / [US] William Chisholm Brent Turvey translation / Liujing Kun

Source: People's Public Security Edit: Wang Daojie