Processing
BLOODSTAINS
Search for and analyze stains that are present within the crime scene, searching for stains that are potentially blood. Bloodstains fall into one of three categories:
Attempt to differentiate the different stains from one another. Assign photo markers to each different bloodstain pattern.
Take examination quality photographs of each individual bloodstain pattern. Include a scale in each photograph. Utilize a tripod with a level to ensure that the camera is at a 90 degree angle in relation to the bloodstain when possible. Fill the photo frame with the bloodstain.
When needed, presumptive blood tests can be used to aid a crime scene investigator in determining which stains within a scene should be collected. Use the appropriate DNA collection technique to collect samples of the bloodstains located throughout the scene. Include the following swabs:
A swab from each individual bloodstain pattern
A swab of the beginning, center and end of each blood trail
A swab each time a single bloodstain pattern changes surfaces
There may be bloodstains within the crime scene that it would be beneficial to enhance like patent prints or shoe impressions. Use one of the following to enhance select bloodstains:
Re-take examination quality photographs of each of the individual bloodstain patterns that were enhanced. Include a scale in each photograph. Utilize a tripod with a level to ensure that the camera is at a 90 degree angle in relation to the bloodstain when possible. Fill the photo frame with the bloodstain.