Essay on Forensic Investigation Of Forensic Dna

1063 Words Mar 10th, 2016 5 Pages
The area of forensics I have chosen to research and represent as an expert witness in this court role play is forensic DNA. I have researched on the work of a DNA analyst and the ways that they utilize their technology regarding forensic evidence for the purposes of solving crime.
DNA profiling allows for a specific and unique view on the genetic markers that typically separate one person from another (save for identical twins, who share the same genetic markers). These markers can help to differentiate two sets of DNA found at a crime scene, and to identify the owner of the DNA sample.
Typically, the use of forensic DNA testing in a crime-involving situation is to derive a DNA profile using the biological material collected from relevant sources. The possible biological materials that can be used for DNA readings are: semen, saliva, urine, feces, hair, teeth, bone, tissue and cells. These can be collected from a number of different sources at the crime scene or from persons of involved in a crime, by running tests on items that may come into contact with their biological materials (eg: weapons, bedding, toothbrushes, cups, etc.). DNA can also be retrieved by less intrusive measures, through analyzing “low-level DNA” (touch DNA). This type of evidence can be collected from surfaces or objects where skin cells were left behind, such as a gun or the areas of bruising on a person’s arm after fighting. Low-level DNA evidence retrieval is useful for rough surfaces, or general…

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