Discuss problem related to biological evidence

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Question: Biological evidence consists of bodily fluids and tissues. Biological evidence has particular significance since DNA analysis can be conducted in many instances. This DNA analysis may identify the donor. Examples of biological evidence containing DNA include:

• Blood.

• Saliva.

• Semen.

• Sloughed skin cells.

• Hair.

• Urine.

• Fecal material.

A DNA profile may also be obtained by swabbing items thought to have been handled by a perpetrator. This type of evidence is sometimes referred to as "touch DNA."

The power of DNA testing is such that examination of biological items can produce very compelling evidence. However, attention must be paid to safety, contamination and degradation issues.

Biological evidence may be detected by any of the following:

• Visual inspection.

• Alternate light source.

• Chemical enhancement, such as luminol.

Reference no: EM132308896

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