Trace Evidence

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Submitted By rhiannonsg
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Trace Evidence Ogle (2012) explained the importance of all types of trace evidence within chapter six of our textbook. Trace evidence are fibers like hair, clothing, or even soil that can be linked to something in turn leading to someone. Trace evidence have certain identifiable properties that allow investigators to follow leads and trails to hone in on a suspect and possible justice for a victim. Because of the importance of trace evidence, it is important that we review the importance of primary transfer, secondary transfer, and the importance of soil within a criminal investigation. In the beginning of our textbook Ogle (2012) introduced us to the Locard exchange principle which describes the theory that when two objects come into contact there would be a cross transfer of trace evidence such as hair, fiber, soil, etc. This is what the basis of primary transfer is. Secondary transfer is maintains the same principle however it goes a step further and refers to the subsequent transfer of trace evidence from the place to which it was transferred to in its primary transfer to another place or thing. Ogle (2012) give the following example: “… fibers transferred from a victim’s sweater to an assailant’s shirt can be subsequently transferred from the assailant’s shirt to the fabric of a chair that the assailant sits in, thus becoming a secondary transfer of the fibers.” (pg. 161)
Ogle (2012) not only applies importance to fabric and fibers being trace evidence but also the importance of collecting and tracing soil. According to Rogers (1992) the first use of soil in a criminal case was the murder of a strangled seamstress in October of 1904. A forensic scientist by the name of George Popp in Germany was asked to examine evidence in the case. He noticed the trace evidence and was able to track the primary and secondary transfers from a previous case…...

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