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The Role of Presumptive Test for Semen in an Investigation - Lab Report Example

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This paper "The Role of Presumptive Test for Semen in an Investigation" focuses on the fact that investigation of the body fluid is of paramount importance to support investigations of the complaint or assault. Laboratory methods enable forensic scientists to detect small quantities of body fluids. …
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The Role of Presumptive Test for Semen in an Investigation
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Download file to see previous pages The specific activity of L-tartrate-inhibitable Acid Phosphatase (ACP). The motive of this experiment was to determine and analyze whether a particular sample was semen using the combined reagents and to exclude false positives. The set of reagents that were used helped determine the colour change that occurs in a sample. Change in the colour implies the sample to be rated positive, negative or unconvincing.

Forensic Science deals with the study of serology and DNA especially in the forensic crime laboratory, “serology analysis” refers to the screening of evidence for bodily fluids (Peace, 2002). It is imperative to perform body fluid detection on evidentiary items before they are sent for DNA analysis. The specimen ranges from materials, such as hairs, fibres, and body fluids, particularly seminal fluid and saliva from one person to another. In cases of sexual assault, the identification of semen is imperative. For the semen identification suspect’s bodily fluid on a complainant’s body or a complainant’s bodily fluid present on clothing or items belonging to a suspect are the sample objects embracing evidentiary or probative value. It is manifested that semen found on swabs in a sexual assault kit is vital as semen can only survive inside a victim for a finite amount of time while semen stains on clothing or bedding are known to have longer duration (Gefrides, L) . There are cases where semen may not be alleged, and therefore an examination of such items for its presence may not provide the evidence. It is imperative that the time between the assault and the examination can be a critical factor in the accurate diagnosis of bodily fluids because longer the time span more will be the loss of the evidence (Gefrides, L).

The evidence is processed and note-taking is performed during serology analysis as this is the first time the evidence is unwrapped in the laboratory. It is the responsibility of the serologists for documenting the type, quality and packaging of the evidence that is received in the laboratory.  ...Download file to see next pagesRead More
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