Saliva Analysis

When dried stains or questioned samples are submitted, the evidence items will be examined to:

• Locate stain(s) using alternate light source
• Identify amylase (a chemical component of saliva)
• Evaluate suitability of evidence for DNA analysis
• Perform DNA typing when requested

When cigarette butts are submitted for saliva testing, the investigator must identify the brand(s) smoked by the victim, suspect, or other participants and confirm the last cleaning time of the location where collected. The examination for saliva and/or DNA typing will not be initiated until this information is provided to the analyst.