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Inorganic trace evidence constitutes: hairs, fibers, tool marks ballistics, glass, paint, and the rest of the evidence which are available within a crime scene while organic trace evidence normally originates from a human or animal. However, organic trace evidence like blood can provide a lot of information concerning the crime that occurred through blood left behind. Law enforcement obtains the victim’s and perpetrator’s blood for which analysis is conducted on bloodstain by photographing or stringing. This process involves connecting strings from various blood spatters to explain the pattern of events during the crime.DNA evidence will also be shown through blood as well as evidence of various diseases of the victim or even the perpetrator who may be male or female.
A wound as organic trace evidence is used as one of the first clues about the crime of which when cleaned and examined through, the morgue vivid information will be obtained by the medical examiner. Further, the responses of the human body towards trauma depend on whether or not the victim is alive or dead. A bite mark found on the victim’s body can also provide information on the crime scene to technicians regarding the perpetrator. The dental system in the record system is compared with the bite mark of the perpetrators through straight teeth, crooked teeth, and crowns, expensive and dental work. (Thompson S, 2006)
The strength of organic evidence through DNA makers has increased for a wide range both in plants and animals of which opportunity had been created for the application of forensic investigations. Currently, few researchers have reported using DNA of non – human species to place suspects next to a place where crime had occurred of which a female homicide and her near-term fetus is used to describe an investigation. Organic evidence also demonstrates the ability of plant microsatellite makers to issue physical evidence which links plant materials to live plants that are near a crime scene. (K. Craft, et al)
Inorganic strength trace evidence lies in the volume of paint and glass evidence with the properties and characterization of both materials when they are presented as transfer evidence. However, through practicing other perspectives, inorganic cannot be considered due to the fact that most important information is getting lost. In addition to that, the material and pattern have to be taken into consideration of which serious dilemma may emerge due to decisions regarding documentation and sampling. Just like in the case of paints, inorganic trace evidence flakes and chips are reached in accordance with the procedure of which they are supposed to be evaluated to achieve potentiality for physical matching towards the source which is not known. In addition to that, layer structure also improves the strength of inorganic evidence when taken into consideration. (Caddy B, 1996)
The weakness of organic evidence is that it can also weaken or destroy a potential source of information contained in a criminal case if blood samples evidence is improperly handled. In conjunction with that, insufficient evidence may also contradict the witness statement or any of the information being given by the suspect. When blood evidence is taken for laboratory tests by various crime scene investigators, the information may change periodically due to change in technology which affects lab policies, lab personnel, or lab administrator change. The preferences of forensic scientists may also vary from lab to lab. (George Schiro, 1995.)
Inorganic evidence does not allow the investigators to come up with completely satisfactory evidence with the notion of related size which leads to a small investigation.However, organic evidence may also contain the connotation of vestige or of something remaining behind after something else has been eliminated from or vanished without trace. (Caddy, B,1996)
Reference
Alexander Beveridge.1998. Forensic Investigation of Explosions. CRC Press.
Associated Content Inc. 2008. Organic Trace Evidence: Collections from Crime Scenes. Web.
Brian Caddy. 1996. Trace Evidence analysis and interpretation. Glass and Paint. CRC Press.
George Schiro. Collection and Preservation of Blood Evidence from Crime Scenes Louisiana State Police Crime Laboratory. Web.
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